feat: Add rabbit spawning button to HUD and implement rabbit tool

index.html

@@ -20,6 +20,7 @@
                 <button id="tree-seed-btn">Tree Seed</button>
                 <button id="fire-btn">Fire</button>
                 <button id="lava-btn">Lava</button>
+                <button id="rabbit-btn">Rabbit</button>
                 <button id="eraser-btn">Eraser</button>
             </div>
             <div class="navigation">

js/input.js

@@ -28,6 +28,8 @@ function setTool(tool) {
         document.getElementById('fire-btn').classList.add('active');
     } else if (tool === LAVA) {
         document.getElementById('lava-btn').classList.add('active');
+    } else if (tool === RABBIT) {
+        document.getElementById('rabbit-btn').classList.add('active');
     } else if (tool === EMPTY) {
         document.getElementById('eraser-btn').classList.add('active');
     }
@@ -114,6 +116,20 @@ function draw(x, y) {
                         colorIndex: Math.floor(Math.random() * FIRE_COLORS.length)
                     });
                 }
+            } 
+            // Special handling for rabbits - only spawn on empty spaces
+            else if (currentTool === RABBIT) {
+                if (getPixel(pixelX, pixelY) === EMPTY) {
+                    setPixel(pixelX, pixelY, RABBIT);
+                    // Initialize rabbit metadata
+                    setMetadata(pixelX, pixelY, {
+                        initialized: true,
+                        jumpCooldown: 0,
+                        direction: Math.random() > 0.5 ? 1 : -1, // 1 for right, -1 for left
+                        jumpHeight: 0,
+                        colorIndex: Math.floor(Math.random() * RABBIT_COLORS.length)
+                    });
+                }
             } else {
                 setPixel(pixelX, pixelY, currentTool);