Tune DAS timing and enable tapping

public/js/app.js

@@ -11,9 +11,17 @@ const keyState = {
   ArrowDown: false,
 };
 
+// Track key press timing for tap vs hold detection
+let keyPressStartTime = null;
+let wasAutoMoved = {
+  ArrowLeft: false,
+  ArrowRight: false,
+  ArrowDown: false,
+};
+
 let dasCounter = 0;
-const DAS_DELAY = 100; // ms before auto-repeat starts
-const ARR_SPEED = 30;  // ms between auto-repeat moves
+const DAS_DELAY = 75;  // ms before auto-repeat starts (reduced from 100 for faster response)
+const ARR_SPEED = 25;  // ms between auto-repeat moves (reduced from 30 for faster movement)
 
 // Initialize when DOM is ready
 document.addEventListener('DOMContentLoaded', () => {
@@ -154,6 +162,8 @@ function setupKeyboardControls() {
       // Track held keys for movement
       if (keyState.hasOwnProperty(e.key)) {
         keyState[e.key] = true;
+        keyPressStartTime = performance.now(); // Track when key was pressed
+        wasAutoMoved[e.key] = false; // Reset auto-move flag for tap detection
         dasCounter = 0; // Reset DAS counter when key pressed
         e.preventDefault();
         return;
@@ -186,6 +196,21 @@ function setupKeyboardControls() {
     if (keyState.hasOwnProperty(e.key)) {
       keyState[e.key] = false;
       dasCounter = 0;
+
+      // Tap detection: if key was held for less than DAS_DELAY and not auto-moved,
+      // send a single move for tap-based horizontal movement
+      if (keyPressStartTime) {
+        const pressDuration = performance.now() - keyPressStartTime;
+        if (pressDuration < DAS_DELAY && !wasAutoMoved[e.key]) {
+          // It was a tap - send single move
+          if (e.key === 'ArrowLeft') {
+            network.sendMove('left');
+          } else if (e.key === 'ArrowRight') {
+            network.sendMove('right');
+          }
+        }
+      }
+      keyPressStartTime = null;
     }
   });
 
@@ -290,9 +315,18 @@ function gameLoop(currentTime) {
     if (dasCounter >= DAS_DELAY) {
       const autoRepeatCounter = (dasCounter - DAS_DELAY) % ARR_SPEED;
       if (autoRepeatCounter < (deltaTime || 0)) {
-        if (keyState.ArrowLeft) network.sendMove('left');
-        if (keyState.ArrowRight) network.sendMove('right');
-        if (keyState.ArrowDown) network.sendDrop();
+        if (keyState.ArrowLeft) {
+          network.sendMove('left');
+          wasAutoMoved.ArrowLeft = true; // Mark as auto-moved so keyup doesn't send another
+        }
+        if (keyState.ArrowRight) {
+          network.sendMove('right');
+          wasAutoMoved.ArrowRight = true;
+        }
+        if (keyState.ArrowDown) {
+          network.sendDrop();
+          wasAutoMoved.ArrowDown = true;
+        }
       }
     }
   }