Update IntervalSpeedDrill.html

IntervalSpeedDrill.html

@@ -10,7 +10,7 @@ <h1>Interval Speed Drill</h1>
     <p>
       This is a simple tool which is designed to help you internalize the
       relationships between notes based on interval distance. If there is
-      interest, perhaps I can expand this to a more proper game -- just email me
+      interest, perhaps I can expand this to a more proper tool -- just email me
       (you can find it on my home page.).
     </p>
     <button onclick="beginGame()">Start game</button>