diff --git a/CMakeLists.txt b/CMakeLists.txt
index c4d82f8..398631e 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,162 +8,17 @@ project(null0
 )
 
 include(FetchContent)
-set(FETCHCONTENT_QUIET 0)
+# set(FETCHCONTENT_QUIET OFF)
 
 set(CMAKE_BUILD_TYPE Release)
-set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
+cmake_policy(SET CMP0077 NEW)
+cmake_policy(SET CMP0135 NEW)
+
 set(BUILD_SHARED_LIBS OFF)
 
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/tools/cmake")
 
-# These options will change what is built, and what libraries are used
-
-if(EMSCRIPTEN)
-  option(CARTS "Build Demo Null0 Carts" FALSE)
-else()
-  option(SDL "Use SDL in hosts (Choose SDL or RAYLIB)" TRUE)
-  option(RAYLIB "Use Raylib in hosts (Choose SDL or RAYLIB)" FALSE)
-  option(CARTS "Build Demo Null0 Carts" TRUE)
-endif()
-
-option(TESTS "Unit tests" FALSE)
-option(LIBRETRO "Build Null0 libretro Host" FALSE)
-option(HOST "Build Null0 Host" TRUE)
-
-# this is used to output options
-macro(message_bool _NAME _VALUE)
-  if(${_VALUE})
-    message(STATUS "  ${_NAME}: enabled")
-  else()
-    message(STATUS "  ${_NAME}: disabled")
-  endif()
-endmacro()
-
-if (LIBRETRO)
-  set(PNTR_APP_LIBRETRO ON)
-endif()
-
-# wamr is used in libretro & native runtimes
-if ((HOST OR LIBRETRO) AND NOT EMSCRIPTEN)
-  find_package(wamr REQUIRED)
-endif()
-
-# check some invalid combos
-
-if(EMSCRIPTEN AND LIBRETRO)
-  message(FATAL_ERROR "Do not build libretro core in emscripten. It will not turn out right.")
-endif()
-
-if (NOT EMSCRIPTEN AND (NOT (SDL OR RAYLIB)))
-  message(FATAL_ERROR "You must set SDL or RAYLIB.")
-endif()
-
-if (SDL AND RAYLIB)
-  message(FATAL_ERROR "You must set SDL or RAYLIB, not both.")
-endif()
-
-# shared defines for the API
-include_directories(${CMAKE_CURRENT_SOURCE_DIR}/null0_api/src)
-
-# core API will be built with any runtime
-if (LIBRETRO OR HOST OR TESTS)
-  if (SDL)
-
-    # SDL
-    set(SDL_SHARED FALSE)
-    set(SDL2_SHARED FALSE)
-    set(SDL_STATIC TRUE)
-    set(SDL_TEST FALSE)
-    set(SDL_TESTS FALSE)
-    set(INTERFACE_SDL2_SHARED false)
-    set(SDL2_DISABLE_UNINSTALL TRUE)
-    set(SDL2_DISABLE_INSTALL TRUE)
-    set(SDL_INSTALL_TESTS FALSE)
-    set(SDL2_LIBRARIES SDL2::SDL2-static)
-    #set(SDL2_LIBRARIES SDL2::SDL2 SDL2::SDL2main)
-
-    # SDL_mixer
-    set(SDL2MIXER_VORBIS STB)
-    set(SDL2MIXER_INSTALL OFF)
-    set(SDL2MIXER_DEPS_SHARED OFF)
-    set(SDL2MIXER_VENDORED OFF)
-    set(SDL2MIXER_SAMPLES OFF)
-    set(SDL2MIXER_CMD OFF)
-    set(SDL2MIXER_FLAC OFF)
-    set(SDL2MIXER_MOD OFF)
-    set(SDL2MIXER_MP3 OFF)
-    set(SDL2MIXER_MIDI_NATIVE OFF)
-    set(SDL2MIXER_OPUS OFF)
-    set(SDL2MIXER_OPUS_SHARED OFF)
-    set(SDL2MIXER_MIDI_FLUIDSYNTH OFF)
-    set(SDL2MIXER_MP3_MPG123 OFF)
-    set(SDL2MIXER_MP3_DRMP3 OFF)
-    set(SDL2MIXER_MOD_XMP OFF)
-    set(SDL2MIXER_MOD_MODPLUG OFF)
-    set(SDL2MIXER_FLAC_DRFLAC OFF)
-    set(SDL2MIXER_FLAC_LIBFLAC OFF)
-    set(SDL2MIXER_VORBIS_VORBISFILE OFF)
-    set(SDL2MIXER_WAVPACK OFF)
-    set(SDL2MIXER_SAMPLES_INSTALL OFF)
-    set(SDL2MIXER_BUILD_SHARED_LIBS OFF)
-
-    find_package(SDL2 REQUIRED)
-    find_package(SDL2_mixer REQUIRED)
-
-    add_definitions(-DPNTR_APP_SDL -DPNTR_PIXELFORMAT_ARGB)
-    include_directories(${SDL2_INCLUDE_DIR}/..)
-  endif()
-
-  if (RAYLIB)
-    find_package(raylib REQUIRED)
-    add_definitions(-DPNTR_APP_RAYLIB -DPNTR_PIXELFORMAT_RGBA)
-  endif()
-
-  if (EMSCRIPTEN)
-    add_definitions(-DPNTR_APP_WEB -DPNTR_PIXELFORMAT_RGBA)
-  endif()
-
-  set(PHYSFS_ARCHIVE_7Z FALSE)
-  set(PHYSFS_ARCHIVE_GRP FALSE)
-  set(PHYSFS_ARCHIVE_HOG FALSE)
-  set(PHYSFS_ARCHIVE_ISO9660 FALSE)
-  set(PHYSFS_ARCHIVE_MVL FALSE)
-  set(PHYSFS_ARCHIVE_QPAK FALSE)
-  set(PHYSFS_ARCHIVE_SLB FALSE)
-  set(PHYSFS_ARCHIVE_VDF FALSE)
-  set(PHYSFS_ARCHIVE_CSM FALSE)
-  set(PHYSFS_ARCHIVE_WAD FALSE)
-  set(PHYSFS_BUILD_STATIC TRUE)
-  set(PHYSFS_BUILD_SHARED FALSE)
-  set(PHYSFS_BUILD_TEST FALSE)
-  set(PHYSFS_BUILD_DOCS FALSE)
-  set(PHYSFS_DISABLE_INSTALL TRUE)
-  set(PHYSFS_TARGETNAME_UNINSTALL "phys-uninstall")
-
-  find_package(pntr REQUIRED)
-  find_package(pntr_app REQUIRED)
-  find_package(physfs REQUIRED)
-  add_subdirectory(null0_api)
-endif()
-
-if (HOST)
-  add_subdirectory(host)
-endif()
-
-if (CARTS)
-  add_subdirectory(cart/c)
-endif()
-
-if (TESTS)
-  add_subdirectory(test)
-endif()
-
+# CARTS=ON/OFF
+# HOST_TYPE=OFF/WEB/RAYLIB/SDL/RETRO
 
-message(STATUS "Null0 will built with the following options:")
-message_bool("Web host" HOST AND EMSCRIPTEN)
-message_bool("Native host" HOST AND (NOT EMSCRIPTEN))
-message_bool("Libretro host" LIBRETRO)
-message_bool("Example carts" CARTS)
-message_bool("Unit tests" TESTS)
-message_bool("Hosts use Raylib" RAYLIB)
-message_bool("Hosts use SDL" SDL)
+find_package(null0 REQUIRED)
diff --git a/DEPS.md b/DEPS.md
deleted file mode 100755
index 2d6da8a..0000000
--- a/DEPS.md
+++ /dev/null
@@ -1,8 +0,0 @@
-I could lock in versions in cmake, but it should mostly work with latest versions of things.
-
-Just in case, here are the git-hashes used:
-
-- physfs: `31209b7`
-- pntr: `5e90f33`
-- pntr_app: `48119e9`
-- wamr: `0ceffe7`
diff --git a/README.md b/README.md
index 7f3d85f..bf5edaf 100755
--- a/README.md
+++ b/README.md
@@ -66,66 +66,44 @@ You will need cmake, ninja & emscripten installed.
 
 ### more on cmake
 
-You can tune how you build things by using cmake directly:
+I like ninja, in the tasks above, because it builds a bit faster, but it's optional, if yuou use cmake directly.
 
-```
-# config
-cmake -B build
-
-# build runtime
-cmake --build build
+Essentially, there are 2 options:
 
-# run with cart
-./build/host/null0 ./build/cart/c/input.null0
+- `CARTS` - Should carts be built? 
+- `HOST_TYPE` - What sort of host are you building (OFF/WEB/RAYLIB/SDL/RETRO)
 
-# configure for web
-emcmake cmake -B wbuild
+You can only build 1 `HOST_TYPE` at a time. `CARTS` can be paired with any `HOST_TYPE`, but not `WEB`, and `WEB` requires emscripten (and should probably be built in a seperate root.)
 
-# build web runtime
-emmake make -C wbuild
-```
-
-These cmake-flags will effect the build:
-
-```
-// Build Null0 libretro Host (don't do this in web-build)
-LIBRETRO:BOOL=OFF
+#### examples
 
-// Build Null0 Host (web or native)
-HOST:BOOL=ON
+There are 2 steps: configure & build.
 
-// Use SDL in hosts
-SDL:BOOL=ON
-
-// Build Null0 raylib Host
-RAYLIB:BOOL=OFF
+```sh
+# configure without ninja (plain make) build only carts
+cmake -B build -DCARTS=ON -DHOST_TYPE=OFF
 
-// Build Demo Null0 Carts
-CARTS:BOOL=ON
+# configure for ninja, build only carts
+cmake -GNinja -B build -DCARTS=ON -DHOST_TYPE=OFF
 
-// Unit tests
-TESTS:BOOL=OFF
-```
+# configure for ninja, build only raylib host
+cmake -GNinja -B build -DCARTS=OFF -DHOST_TYPE=RAYLIB
 
-You can set them like this:
+# configure for ninja, build only SDL host
+cmake -GNinja -B build -DCARTS=OFF -DHOST_TYPE=SDL
 
-```
-# don't build demo carts, use defaults
-cmake -B build -DCARTS=0
+# configure for ninja, build only libretro-core
+cmake -GNinja -B build -DCARTS=OFF -DHOST_TYPE=RETRO
 
-# don't buid anything but the carts (since LIBRETRO and TESTS is off by default)
-cmake -B build -DHOST=0
+# configure for ninja, build only web-host (in wbuild/)
+emcmake cmake -GNinja -B wbuild
 
-# just build unit-tests
-cmake -B build -DHOST=0 -DTESTS=1 -DCARTS=0
+# after configure, build build
 cmake --build build
-./build/test/test_colors
 
+# after configure, build wbuild (for web)
+cmake --build wbuild
 
-# just build carts
-cmake -B build -DHOST=0 -DTESTS=0 -DCARTS=1
-cmake --build build
-```
 
 ## todo
 
diff --git a/docs/cart/colorbars.null0 b/docs/cart/colorbars.null0
index c9396d7..2e64482 100644
Binary files a/docs/cart/colorbars.null0 and b/docs/cart/colorbars.null0 differ
diff --git a/docs/cart/draw.null0 b/docs/cart/draw.null0
index ea55384..672f864 100644
Binary files a/docs/cart/draw.null0 and b/docs/cart/draw.null0 differ
diff --git a/docs/cart/filesystem.null0 b/docs/cart/filesystem.null0
index 89edc4f..dab295a 100644
Binary files a/docs/cart/filesystem.null0 and b/docs/cart/filesystem.null0 differ
diff --git a/docs/cart/flappybird.null0 b/docs/cart/flappybird.null0
index 347f8db..96d9410 100644
Binary files a/docs/cart/flappybird.null0 and b/docs/cart/flappybird.null0 differ
diff --git a/docs/cart/hello.null0 b/docs/cart/hello.null0
index 797953d..98b703d 100644
Binary files a/docs/cart/hello.null0 and b/docs/cart/hello.null0 differ
diff --git a/docs/cart/input.null0 b/docs/cart/input.null0
index 9358f7e..e947c56 100644
Binary files a/docs/cart/input.null0 and b/docs/cart/input.null0 differ
diff --git a/docs/cart/justlog.null0 b/docs/cart/justlog.null0
index dce8b61..1642b8a 100644
Binary files a/docs/cart/justlog.null0 and b/docs/cart/justlog.null0 differ
diff --git a/docs/cart/sound.null0 b/docs/cart/sound.null0
index 1556313..340c549 100644
Binary files a/docs/cart/sound.null0 and b/docs/cart/sound.null0 differ
diff --git a/docs/cart/tracker.null0 b/docs/cart/tracker.null0
index 9d53c0c..2c1d1b5 100644
Binary files a/docs/cart/tracker.null0 and b/docs/cart/tracker.null0 differ
diff --git a/host/CMakeLists.txt b/host/CMakeLists.txt
index 2c022a1..62583e9 100755
--- a/host/CMakeLists.txt
+++ b/host/CMakeLists.txt
@@ -1,13 +1,15 @@
-add_executable(${PROJECT_NAME} src/main.c)
-
-if(NOT EMSCRIPTEN)
-  add_library(vmlib ${WAMR_RUNTIME_LIB_SOURCE})
-  target_link_libraries(${PROJECT_NAME} null0_api vmlib)
+if (NULL0_HOST_TYPE_RETRO)
+  add_library(${PROJECT_NAME}_libretro src/main.c)
+  target_link_libraries(${PROJECT_NAME}_libretro null0_api vmlib)
+else()
+  if (NULL0_HOST_TYPE_SDL OR NULL0_HOST_TYPE_RAYLIB OR NULL0_HOST_TYPE_WEB)
+    add_executable(${PROJECT_NAME} src/main.c)
+      if(NULL0_HOST_TYPE_WEB)
+        set(CMAKE_EXECUTABLE_SUFFIX ".mjs")
+        target_link_options(${PROJECT_NAME} PRIVATE -sFORCE_FILESYSTEM -sEXPORTED_RUNTIME_METHODS=FS,stringToUTF8 -sEXPORTED_FUNCTIONS=@${CMAKE_CURRENT_SOURCE_DIR}/functions.txt)
+        target_link_libraries(${PROJECT_NAME} null0_api)
+      else()
+        target_link_libraries(${PROJECT_NAME} null0_api vmlib)
+      endif()
+  endif()
 endif()
-
-if(EMSCRIPTEN)
-  set(CMAKE_EXECUTABLE_SUFFIX ".mjs")
-  target_link_options(${PROJECT_NAME} PRIVATE -sFORCE_FILESYSTEM -sEXPORTED_RUNTIME_METHODS=FS,stringToUTF8 -sEXPORTED_FUNCTIONS=@${CMAKE_CURRENT_SOURCE_DIR}/functions.txt)
-endif()
-
-target_link_libraries(${PROJECT_NAME} null0_api)
diff --git a/null0_api/CMakeLists.txt b/null0_api/CMakeLists.txt
index 207a6be..278b60d 100755
--- a/null0_api/CMakeLists.txt
+++ b/null0_api/CMakeLists.txt
@@ -1,16 +1,13 @@
 add_library(null0_api src/main.c src/sfx_gen.c)
 
-# TODO: check for emscripten
-
-if (RAYLIB)
+if (NULL0_HOST_TYPE_RAYLIB)
   target_link_libraries(null0_api raylib pntr pntr_app physfs-static)
 endif()
 
-if (SDL)
-  message("SDL libs: ${SDL2_LIBRARIES} ${SDL2_MIXER_LIBRARIES} ${SDL2_IMAGE_LIBRARIES}")
+if (NULL0_HOST_TYPE_SDL)
   target_link_libraries(null0_api ${SDL2_LIBRARIES} pntr pntr_app physfs-static)
 endif()
 
-if (EMSCRIPTEN)
+if (NULL0_HOST_TYPE_WEB)
   target_link_libraries(null0_api pntr pntr_app physfs-static)
 endif()
\ No newline at end of file
diff --git a/package.json b/package.json
index f259a7d..4161f41 100755
--- a/package.json
+++ b/package.json
@@ -7,10 +7,10 @@
   "scripts": {
     "clean": "rimraf build wbuild docs/cart docs/wasm",
     "start": "npm run build:site && live-server docs",
-    "build:retro": "cmake -GNinja -B build -DLIBRETRO=1 -DHOST=0 -DTESTS=0 -DCARTS=0 && cmake --build build",
-    "build:carts": "cmake -GNinja -B build -DLIBRETRO=0 -DHOST=0 -DTESTS=0 -DCARTS=1 && cmake --build build",
-    "build:host": "cmake -GNinja -B build -DLIBRETRO=0 -DHOST=1 -DTESTS=0 -DCARTS=0 && cmake --build build",
-    "build:web": "emcmake cmake -DLIBRETRO=0 -DHOST=1 -DTESTS=0 -DCARTS=0 -GNinja -B wbuild && cmake --build wbuild",
+    "build:retro": "cmake -GNinja -B build -DCARTS=OFF -DHOST_TYPE=RETRO && cmake --build build",
+    "build:carts": "cmake -GNinja -B build -DCARTS=ON -DHOST_TYPE=OFF && cmake --build build",
+    "build:host": "cmake -GNinja -B build  -DCARTS=OFF -DHOST_TYPE=RAYLIB && cmake --build build",
+    "build:web": "emcmake cmake -GNinja -B wbuild && cmake --build wbuild",
     "build:site": "npm run build:carts && npm run build:web && mkdir -p docs/wasm docs/cart && cp wbuild/host/null0.* docs/wasm && cp build/cart/c/*.null0 docs/cart"
   },
   "keywords": [],
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
deleted file mode 100755
index 1103cbd..0000000
--- a/test/CMakeLists.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-add_executable(test_colors test_colors.c)
-add_executable(test_sound test_sound.c)
-
-if (RAYLIB)
-  target_link_libraries(test_colors raylib pntr pntr_app)
-  target_link_libraries(test_sound raylib pntr pntr_app)
-endif()
-
-if (SDL)
-  target_link_libraries(test_colors ${SDL2_LIBRARIES} pntr pntr_app)
-  target_link_libraries(test_sound ${SDL2_LIBRARIES} pntr pntr_app)
-endif()
-
-
-
diff --git a/test/test_colors.c b/test/test_colors.c
deleted file mode 100755
index 009bae6..0000000
--- a/test/test_colors.c
+++ /dev/null
@@ -1,71 +0,0 @@
-// this is a native implementation of colorbars cart, to ensure they match
-
-#define PNTR_IMPLEMENTATION
-#define PNTR_APP_IMPLEMENTATION
-
-#include "pntr_app.h"
-
-pntr_color colors[27];
-
-bool Init(pntr_app* app) {
-  colors[0] = PNTR_LIGHTGRAY;
-  colors[1] = PNTR_GRAY;
-  colors[2] = PNTR_DARKGRAY;
-  colors[3] = PNTR_YELLOW;
-  colors[4] = PNTR_GOLD;
-  colors[5] = PNTR_ORANGE;
-  colors[6] = PNTR_PINK;
-  colors[7] = PNTR_RED;
-  colors[8] = PNTR_MAROON;
-  colors[9] = PNTR_GREEN;
-  colors[10] = PNTR_LIME;
-  colors[11] = PNTR_DARKGREEN;
-  colors[12] = PNTR_SKYBLUE;
-  colors[13] = PNTR_BLUE;
-  colors[14] = PNTR_DARKBLUE;
-  colors[15] = PNTR_PURPLE;
-  colors[16] = PNTR_VIOLET;
-  colors[17] = PNTR_DARKPURPLE;
-  colors[18] = PNTR_BEIGE;
-  colors[19] = PNTR_BROWN;
-  colors[20] = PNTR_DARKBROWN;
-  colors[21] = PNTR_WHITE;
-  colors[22] = PNTR_BLACK;
-  colors[24] = PNTR_BLANK;
-  colors[25] = PNTR_MAGENTA;
-  colors[26] = PNTR_RAYWHITE;
-
-  return true;
-}
-
-bool Update(pntr_app* app, pntr_image* screen) {
-  pntr_clear_background(screen, PNTR_BLACK);
-
-  int x;
-  int c = 0;
-  for (x = 10; x < (28 * 10); x += 10) {
-    pntr_draw_rectangle_fill(screen, x + 13, 5, 8, 5, PNTR_WHITE);
-    pntr_draw_rectangle_fill(screen, x + 15, 15, 5, 210, colors[c++]);
-    pntr_draw_rectangle_fill(screen, x + 13, 230, 8, 5, PNTR_WHITE);
-  }
-
-  return true;
-}
-
-void Close(pntr_app* app) {
-}
-
-void Event(pntr_app* app, pntr_app_event* event) {
-}
-
-pntr_app Main(int argc, char* argv[]) {
-  return (pntr_app){
-      .width = 320,
-      .height = 240,
-      .title = "null0",
-      .init = Init,
-      .update = Update,
-      .close = Close,
-      .event = Event,
-      .fps = 60};
-}
\ No newline at end of file
diff --git a/test/test_sound.c b/test/test_sound.c
deleted file mode 100755
index cb33fcf..0000000
--- a/test/test_sound.c
+++ /dev/null
@@ -1,39 +0,0 @@
-#define PNTR_IMPLEMENTATION
-#define PNTR_ENABLE_DEFAULT_FONT
-#define PNTR_APP_IMPLEMENTATION
-
-#include "pntr_app.h"
-
-pntr_font* font;
-pntr_sound* sound;
-
-bool Init(pntr_app* app) {
-  font = pntr_load_font_default();
-  sound = pntr_load_sound("cart/c/sound/assets/apache.ogg");
-  pntr_play_sound(sound, true);
-  return true;
-}
-
-bool Update(pntr_app* app, pntr_image* screen) {
-  pntr_clear_background(screen, PNTR_BLACK);
-  pntr_draw_text(screen, font, "You should hear sound.", 80, 110, PNTR_WHITE);
-  return true;
-}
-
-void Close(pntr_app* app) {
-}
-
-void Event(pntr_app* app, pntr_app_event* event) {
-}
-
-pntr_app Main(int argc, char* argv[]) {
-  return (pntr_app){
-      .width = 320,
-      .height = 240,
-      .title = "null0",
-      .init = Init,
-      .update = Update,
-      .close = Close,
-      .event = Event,
-      .fps = 60};
-}
\ No newline at end of file
diff --git a/tools/cmake/FindSDL2.cmake b/tools/cmake/FindSDL2.cmake
index 0aa48ee..c18f4da 100755
--- a/tools/cmake/FindSDL2.cmake
+++ b/tools/cmake/FindSDL2.cmake
@@ -1,10 +1,6 @@
-# SDL2
-include(FetchContent)
-FetchContent_Declare(
-    SDL2Source
-    GIT_REPOSITORY https://github.com/libsdl-org/SDL.git
-    GIT_TAG release-2.30.2
-    GIT_SHALLOW 1
+FetchContent_Declare(SDL2Source
+  URL https://github.com/libsdl-org/SDL/archive/refs/tags/release-2.30.5.zip
 )
+
 FetchContent_MakeAvailable(SDL2Source)
 #include_directories(${SDL2Source_SOURCE_DIR})
diff --git a/tools/cmake/FindSDL2_mixer.cmake b/tools/cmake/FindSDL2_mixer.cmake
index 9b62edf..6878790 100755
--- a/tools/cmake/FindSDL2_mixer.cmake
+++ b/tools/cmake/FindSDL2_mixer.cmake
@@ -1,10 +1,6 @@
-# SDL2_mixer
-include(FetchContent)
-FetchContent_Declare(
-    SDL2MixerSource
-    GIT_REPOSITORY https://github.com/libsdl-org/SDL_mixer.git
-    GIT_TAG release-2.8.0
-    GIT_SHALLOW 1
+FetchContent_Declare(SDL2MixerSource
+  URL https://github.com/libsdl-org/SDL_mixer/archive/refs/tags/release-2.8.0.zip
 )
+
 FetchContent_MakeAvailable(SDL2MixerSource)
 #include_directories(${sdl2mixersource_SOURCE_DIR}/include)
diff --git a/tools/cmake/Findnull0.cmake b/tools/cmake/Findnull0.cmake
new file mode 100644
index 0000000..8140217
--- /dev/null
+++ b/tools/cmake/Findnull0.cmake
@@ -0,0 +1,157 @@
+# handle different options
+# CARTS=ON/OFF
+# HOST_TYPE=OFF/WEB/RAYLIB/SDL/RETRO
+
+if(EMSCRIPTEN)
+  set(HOST_TYPE  "WEB")
+  set(NULL0_HOST_TYPE_WEB  ON)
+  set(CARTS OFF)
+else()
+  set(NULL0_HOST_TYPE_WEB  OFF)
+  option(CARTS "Build demo-carts" ON)
+  if(NOT DEFINED HOST_TYPE)
+    set(HOST_TYPE  "RAYLIB")
+  endif()
+  if("${HOST_TYPE}" STREQUAL "WEB")
+    message(FATAL_ERROR "You must build WEB with emscripten (use emcmake)")
+  endif()
+endif()
+
+message(STATUS "Null0 will built with the following options:")
+if(CARTS)
+  message(STATUS "  Example carts: ON")
+else()
+  message(STATUS "  Example carts: OFF")
+endif()
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/null0_api/src)
+
+if(HOST_TYPE)
+  message(STATUS "  Host: " ${HOST_TYPE})
+  
+  # setup easier booleans
+  if("${HOST_TYPE}" STREQUAL "RAYLIB")
+    set(NULL0_HOST_TYPE_RAYLIB  ON)
+    set(NULL0_HOST_TYPE_SDL  OFF)
+    set(NULL0_HOST_TYPE_RETRO  OFF)
+  endif()
+
+  if("${HOST_TYPE}" STREQUAL "SDL")
+    set(NULL0_HOST_TYPE_RAYLIB  OFF)
+    set(NULL0_HOST_TYPE_SDL  ON)
+    set(NULL0_HOST_TYPE_RETRO  OFF)
+  endif()
+
+  if("${HOST_TYPE}" STREQUAL "WEB")
+    set(NULL0_HOST_TYPE_RAYLIB  OFF)
+    set(NULL0_HOST_TYPE_SDL  OFF)
+    set(NULL0_HOST_TYPE_RETRO  OFF)
+  endif()
+
+  if("${HOST_TYPE}" STREQUAL "RETRO")
+    set(NULL0_HOST_TYPE_RAYLIB  OFF)
+    set(NULL0_HOST_TYPE_SDL  OFF)
+    set(NULL0_HOST_TYPE_RETRO  ON)
+  endif()
+
+  option(NULL0_HOST_TYPE_RAYLIB "Build raylib host" ${NULL0_HOST_TYPE_RAYLIB})
+  option(NULL0_HOST_TYPE_SDL "Build SDL host" ${NULL0_HOST_TYPE_SDL})
+  option(NULL0_HOST_TYPE_RETRO "Build libretro-core host" ${NULL0_HOST_TYPE_RETRO})
+  option(NULL0_HOST_TYPE_WEB "Build web-host" ${NULL0_HOST_TYPE_WEB})
+
+  if(NOT NULL0_HOST_TYPE_WEB AND NOT NULL0_HOST_TYPE_RAYLIB AND NOT NULL0_HOST_TYPE_SDL AND NOT NULL0_HOST_TYPE_RETRO)
+    message(FATAL_ERROR "Invalid HOST_TYPE: (${HOST_TYPE}) choose OFF, WEB, RAYLIB, SDL, or RETRO")
+  endif()
+
+  if (NULL0_HOST_TYPE_SDL)
+    set(SDL_SHARED  FALSE)
+    set(SDL2_SHARED  FALSE)
+    set(SDL_STATIC  TRUE)
+    set(SDL_TEST  FALSE)
+    set(SDL_TESTS  FALSE)
+    set(INTERFACE_SDL2_SHARED  FALSE)
+    set(SDL2_DISABLE_UNINSTALL  TRUE)
+    set(SDL2_DISABLE_INSTALL  TRUE)
+    set(SDL_INSTALL_TESTS  FALSE)
+    set(SDL2_LIBRARIES  SDL2::SDL2-static)
+    #set(SDL2_LIBRARIES SDL2::SDL2 SDL2::SDL2main)
+
+    # SDL_mixer
+    set(SDL2MIXER_VORBIS  STB)
+    set(SDL2MIXER_INSTALL  OFF)
+    set(SDL2MIXER_DEPS_SHARED  OFF)
+    set(SDL2MIXER_VENDORED  OFF)
+    set(SDL2MIXER_SAMPLES  OFF)
+    set(SDL2MIXER_CMD  OFF)
+    set(SDL2MIXER_FLAC  OFF)
+    set(SDL2MIXER_MOD  OFF)
+    set(SDL2MIXER_MP3  OFF)
+    set(SDL2MIXER_MIDI_NATIVE  OFF)
+    set(SDL2MIXER_OPUS  OFF)
+    set(SDL2MIXER_OPUS_SHARED  OFF)
+    set(SDL2MIXER_MIDI_FLUIDSYNTH  OFF)
+    set(SDL2MIXER_MP3_MPG123  OFF)
+    set(SDL2MIXER_MP3_DRMP3  OFF)
+    set(SDL2MIXER_MOD_XMP  OFF)
+    set(SDL2MIXER_MOD_MODPLUG  OFF)
+    set(SDL2MIXER_FLAC_DRFLAC  OFF)
+    set(SDL2MIXER_FLAC_LIBFLAC  OFF)
+    set(SDL2MIXER_VORBIS_VORBISFILE  OFF)
+    set(SDL2MIXER_WAVPACK  OFF)
+    set(SDL2MIXER_SAMPLES_INSTALL  OFF)
+    set(SDL2MIXER_BUILD_SHARED_LIBS  OFF)
+
+    find_package(SDL2 REQUIRED)
+    find_package(SDL2_mixer REQUIRED)
+
+    add_definitions(-DPNTR_APP_SDL -DPNTR_PIXELFORMAT_ARGB)
+    include_directories(${SDL2_INCLUDE_DIR}/..)
+  endif()
+
+  if (NULL0_HOST_TYPE_RAYLIB)
+    add_definitions(-DPNTR_NO_STB_IMAGE_IMPLEMENTATION)
+    add_definitions(-DPNTR_NO_STB_IMAGE_WRITE_IMPLEMENTATION)
+    find_package(raylib REQUIRED)
+    add_definitions(-DPNTR_APP_RAYLIB -DPNTR_PIXELFORMAT_RGBA)
+  endif()
+
+  if (NULL0_HOST_TYPE_WEB)
+    add_definitions(-DPNTR_APP_WEB -DPNTR_PIXELFORMAT_RGBA)
+  else()
+    find_package(wamr REQUIRED)
+    add_library(vmlib ${WAMR_RUNTIME_LIB_SOURCE})
+  endif()
+
+  if (NULL0_HOST_TYPE_RETRO)
+    add_definitions(-DPNTR_APP_LIBRETRO -DPNTR_PIXELFORMAT_RGBA)
+  endif()
+
+  set(PHYSFS_ARCHIVE_7Z CACHE INTERNAL FALSE)
+  set(PHYSFS_ARCHIVE_GRP CACHE INTERNAL FALSE)
+  set(PHYSFS_ARCHIVE_HOG CACHE INTERNAL FALSE)
+  set(PHYSFS_ARCHIVE_ISO9660 CACHE INTERNAL FALSE)
+  set(PHYSFS_ARCHIVE_MVL CACHE INTERNAL FALSE)
+  set(PHYSFS_ARCHIVE_QPAK CACHE INTERNAL FALSE)
+  set(PHYSFS_ARCHIVE_SLB CACHE INTERNAL FALSE)
+  set(PHYSFS_ARCHIVE_VDF CACHE INTERNAL FALSE)
+  set(PHYSFS_ARCHIVE_CSM CACHE INTERNAL FALSE)
+  set(PHYSFS_ARCHIVE_WAD CACHE INTERNAL FALSE)
+  set(PHYSFS_BUILD_STATIC TRUE)
+  set(PHYSFS_BUILD_SHARED CACHE INTERNAL FALSE)
+  set(PHYSFS_BUILD_TEST CACHE INTERNAL FALSE)
+  set(PHYSFS_BUILD_DOCS CACHE INTERNAL FALSE)
+  set(PHYSFS_DISABLE_INSTALL CACHE INTERNAL TRUE)
+
+  find_package(pntr REQUIRED)
+  find_package(pntr_app REQUIRED)
+  find_package(physfs REQUIRED)
+
+  add_subdirectory(null0_api)
+  add_subdirectory(host)
+else()
+  message(STATUS "  Host: OFF")
+endif()
+
+if (CARTS)
+  add_subdirectory(cart/c)
+endif()
diff --git a/tools/cmake/Findphysfs.cmake b/tools/cmake/Findphysfs.cmake
index 2efeaee..96de571 100755
--- a/tools/cmake/Findphysfs.cmake
+++ b/tools/cmake/Findphysfs.cmake
@@ -1,9 +1,7 @@
-FetchContent_Declare(
-  physfs
-  GIT_REPOSITORY https://github.com/icculus/physfs.git
-  GIT_TAG main
-  GIT_PROGRESS TRUE
-  GIT_SHALLOW 1
+FetchContent_Declare(physfs
+  URL https://github.com/icculus/physfs/archive/refs/heads/master.zip
 )
+FetchContent_MakeAvailable(physfs)
+
 FetchContent_MakeAvailable(physfs)
 include_directories(${physfs_SOURCE_DIR}/src)
diff --git a/tools/cmake/Findpntr.cmake b/tools/cmake/Findpntr.cmake
index fa2c504..20edd99 100755
--- a/tools/cmake/Findpntr.cmake
+++ b/tools/cmake/Findpntr.cmake
@@ -1,8 +1,5 @@
-# pntr
-include(FetchContent)
-FetchContent_Declare(
-    pntr
-    GIT_REPOSITORY https://github.com/robloach/pntr.git
-    GIT_TAG 23099c7787754d355400a31edefb166db3d93012
+FetchContent_Declare(pntr
+  URL https://github.com/RobLoach/pntr/archive/refs/heads/master.zip
 )
 FetchContent_MakeAvailable(pntr)
+
diff --git a/tools/cmake/Findpntr_app.cmake b/tools/cmake/Findpntr_app.cmake
index 35320c0..1efa685 100755
--- a/tools/cmake/Findpntr_app.cmake
+++ b/tools/cmake/Findpntr_app.cmake
@@ -1,9 +1,5 @@
-FetchContent_Declare(
-  pntr_app
-  GIT_REPOSITORY https://github.com/robloach/pntr_app.git
-  GIT_TAG master
-  GIT_PROGRESS 1
-  GIT_SHALLOW 1
+FetchContent_Declare(pntr_app
+  URL https://github.com/RobLoach/pntr_app/archive/refs/heads/master.zip
 )
 FetchContent_MakeAvailable(pntr_app)
-include_directories(${pntr_app_SOURCE_DIR}/include)
\ No newline at end of file
+include_directories(${pntr_app_SOURCE_DIR}/include)
diff --git a/tools/cmake/Findraylib.cmake b/tools/cmake/Findraylib.cmake
index db3e894..3f92d8a 100755
--- a/tools/cmake/Findraylib.cmake
+++ b/tools/cmake/Findraylib.cmake
@@ -1,12 +1,8 @@
-# raylib
-include(FetchContent)
-FetchContent_Declare(
-    raylib
-    GIT_REPOSITORY https://github.com/raysan5/raylib.git
-    GIT_TAG 5.0
-    GIT_SHALLOW 1
+FetchContent_Declare(raylib
+  URL https://github.com/raysan5/raylib/archive/refs/tags/5.0.zip
 )
-FetchContent_GetProperties(raylib)
+FetchContent_MakeAvailable(raylib)
+
 if (NOT raylib_POPULATED)
     set(FETCHCONTENT_QUIET NO)
     FetchContent_Populate(raylib)
diff --git a/tools/cmake/Findwamr.cmake b/tools/cmake/Findwamr.cmake
index 21b8453..82e6bdc 100755
--- a/tools/cmake/Findwamr.cmake
+++ b/tools/cmake/Findwamr.cmake
@@ -5,12 +5,9 @@ set (WAMR_BUILD_AOT 0)
 set (WAMR_BUILD_LIBC_BUILTIN 1)
 set (WAMR_BUILD_LIBC_WASI 1)
 set (WAMR_BUILD_SIMD 1)
-FetchContent_Declare(
-  wamr
-  GIT_REPOSITORY https://github.com/bytecodealliance/wasm-micro-runtime.git
-  GIT_TAG main
-  GIT_PROGRESS 1
-  GIT_SHALLOW 1
+
+FetchContent_Declare(wamr
+  URL https://github.com/bytecodealliance/wasm-micro-runtime/archive/refs/heads/master.zip
 )
 FetchContent_MakeAvailable(wamr)
 include (${wamr_SOURCE_DIR}/build-scripts/runtime_lib.cmake)
\ No newline at end of file