diff --git a/src/lib.rs b/src/lib.rs
index a2d56fe..5d9d9b1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,4 @@
+/// information about one `Cell`: either `Dead` or `Alive`
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum Cell {
     Dead = 0,
@@ -12,6 +13,7 @@ impl Cell {
     }
 }
 
+/// the `Universe` in which game plays. Represented as a `Vec` of `Cell`s.
 #[derive(Debug)]
 pub struct Universe {
     width: u32,
@@ -28,8 +30,8 @@ impl Universe {
     fn live_neighbour_count(&self, row: u32, col: u32) -> u8 {
         let mut sum = 0;
 
-        for delta_row in [self.height - 1, 0, 1].iter().copied() {
-            for delta_col in [self.width - 1, 0, 1].iter().copied() {
+        for delta_row in [self.height - 1, 0, 1] {
+            for delta_col in [self.width - 1, 0, 1] {
                 if delta_row == 0 && delta_col == 0 {
                     continue;
                 }
@@ -66,20 +68,6 @@ impl Universe {
         }
     }
 
-    /// Get the dead and alive values of the entire universe.
-    pub fn get_cells(&self) -> &[Cell] {
-        &self.cells
-    }
-
-    /// Set cells to be alive in a universe by passing the row and column
-    /// of each cell as an array.
-    pub fn set_cells(&mut self, cells: &[(u32, u32)]) {
-        for (row, col) in cells.iter().copied() {
-            let idx = self.get_index(row, col);
-            self.cells[idx] = Cell::Alive;
-        }
-    }
-
     /// Create universe with width, height: inserting starting shape into the middle
     ///
     /// # Errors
@@ -114,11 +102,8 @@ impl Universe {
 
         Ok(uni)
     }
-}
 
-/// Public functions exported to JavaScript as well.
-impl Universe {
-    /// update life: Universe
+    /// update life: `Universe`
     pub fn tick(&mut self) {
         let mut next = self.cells.clone();
 
@@ -152,11 +137,6 @@ impl Universe {
         self.cells = next;
     }
 
-    /// turn formatted self to string
-    pub fn render(&self) -> String {
-        self.to_string()
-    }
-
     pub fn width(&self) -> u32 {
         self.width
     }
@@ -165,27 +145,6 @@ impl Universe {
         self.height
     }
 
-    /// return `cells` as pointer: starting mem-pointer
-    pub fn cells(&self) -> *const Cell {
-        self.cells.as_ptr()
-    }
-
-    /// Set the width of the universe.
-    ///
-    /// Resets all cells to the dead state.
-    pub fn set_width(&mut self, width: u32) {
-        self.width = width;
-        self.cells = (0..width * self.height).map(|_i| Cell::Dead).collect();
-    }
-
-    /// Set the height of the universe.
-    ///
-    /// Resets all cells to the dead state.
-    pub fn set_height(&mut self, height: u32) {
-        self.height = height;
-        self.cells = (0..self.width * height).map(|_i| Cell::Dead).collect();
-    }
-
     /// toggles cell at (`row`;`col`)
     pub fn toggle_cell(&mut self, row: u32, col: u32) {
         let idx = self.get_index(row, col);
diff --git a/src/main.rs b/src/main.rs
index 7a959f1..c189961 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,6 @@
 use conways_game_of_life_cli_rs::*;
 
+const DEFAULT_DUR: Duration = Duration::from_millis(400);
 const HELP: &str = r#"Blocking poll() & non-blocking read()
  - Prints current state of Conway's Game of Life if there's no event
  - Use Esc or `q` to quit
@@ -50,20 +51,18 @@ fn print_events() -> io::Result<()> {
     let mut i: usize = 0;
     let mut universe = get_shape(wh, i).unwrap();
 
-    const DEFAULT_DUR: Duration = Duration::from_millis(400);
     let mut poll_t = DEFAULT_DUR;
     let mut paused = false;
     let mut prev_poll_t = DEFAULT_DUR;
 
     loop {
-        // Wait up to 1s for another event
+        // Wait up to `poll_t` for another event
         if poll(poll_t)? {
             // It's guaranteed that read() won't block if `poll` returns `Ok(true)`
             let event = read()?;
 
             if kmaps::quit().contains(&event) {
                 println!("Quitting...\r");
-                // queue!(io::stdout(), Print("Quitting..."))?;
                 break;
             } else if kmaps::slower().contains(&event) {
                 if poll_t < Duration::from_millis(40) {
@@ -135,36 +134,7 @@ fn print_events() -> io::Result<()> {
                 } else {
                     eprintln!("Couldn't make larger");
                 }
-            // } else if event == MouseEventKind::Down(MouseButton::Left.into()) {
-            // } else if event == Event::Mouse(MouseEvent { kind, column , row , modifiers  }) {
-            // } else {
-            // println!("Unknown: Event::{:?}\r", event);
             } else {
-                // match event {
-                //     crossterm::event::Event::FocusGained => eprintln!("Focus Gained."),
-                //     crossterm::event::Event::FocusLost => eprintln!("Focus Lost."),
-                //     crossterm::event::Event::Key(k) => {
-                //         eprintln!("Unknown key: {:?}", k);
-                //     }
-                //     crossterm::event::Event::Mouse(m) => {
-                //         if m.kind == MouseEventKind::Up(MouseButton::Left)
-                //             || m.kind == MouseEventKind::Drag(MouseButton::Left)
-                //         {
-                //             // eprintln!("row: {}, col: {}\r", m.row - 1, m.column - 1);
-                //             std::thread::sleep(DEFAULT_DUR);
-                //             if m.row > 0
-                //                 && m.row <= universe.height() as u16
-                //                 && m.column > 0
-                //                 && m.column < universe.width() as u16
-                //             {
-                //                 universe.toggle_cell((m.row - 1).into(), (m.column - 1).into());
-                //             }
-                //             println!("{}", universe);
-                //         }
-                //     }
-                //     crossterm::event::Event::Paste(_) => eprintln!("Paste"),
-                //     crossterm::event::Event::Resize(_, _) => eprintln!("Resize"),
-                // }
                 eprintln!("Unknown event: {:?}", event);
             }
         } else {
@@ -173,13 +143,9 @@ fn print_events() -> io::Result<()> {
             execute!(io::stdout(), MoveTo(0, 0), Clear(ClearType::FromCursorDown))?;
             println!("{}", universe);
         }
-        // io::stdout().flush()?;
     }
 
-    execute!(
-        io::stdout(),
-        LeaveAlternateScreen /*, DisableMouseCapture*/
-    )?;
+    execute!(io::stdout(), LeaveAlternateScreen)?;
 
     Ok(())
 }