diff --git a/01 - JavaScript Drum Kit/index-FINISHED.html b/01 - JavaScript Drum Kit/index-FINISHED.html
index 1a16d0997c..f73f4fea6a 100644
--- a/01 - JavaScript Drum Kit/index-FINISHED.html	
+++ b/01 - JavaScript Drum Kit/index-FINISHED.html	
@@ -58,12 +58,16 @@
   <audio data-key="76" src="sounds/tink.wav"></audio>
 
 <script>
+  let justPlayed = null;
+  
   function removeTransition(e) {
     if (e.propertyName !== 'transform') return;
     e.target.classList.remove('playing');
   }
 
   function playSound(e) {
+    if (e.keyCode === justPlayed) return; // If same key has just been played without key being released, don't play again
+    
     const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
     const key = document.querySelector(`div[data-key="${e.keyCode}"]`);
     if (!audio) return;
@@ -71,11 +75,13 @@
     key.classList.add('playing');
     audio.currentTime = 0;
     audio.play();
+    justPlayed = e.keyCode; // Set the key that has just been played
   }
 
   const keys = Array.from(document.querySelectorAll('.key'));
   keys.forEach(key => key.addEventListener('transitionend', removeTransition));
   window.addEventListener('keydown', playSound);
+  window.addEventListener('keyup', () => justPlayed = null); // Allow key to be played again
 </script>