diff --git a/js/input.js b/js/input.js
index a4e53e8..548b529 100644
--- a/js/input.js
+++ b/js/input.js
@@ -38,7 +38,6 @@ function setTool(tool) {
 }
 
 function handleMouseDown(e) {
-    const canvas = document.getElementById('simulation-canvas');
     const rect = canvas.getBoundingClientRect();
     const x = e.clientX - rect.left;
     const y = e.clientY - rect.top;
@@ -58,7 +57,6 @@ function handleMouseDown(e) {
 }
 
 function handleMouseMove(e) {
-    const canvas = document.getElementById('simulation-canvas');
     const rect = canvas.getBoundingClientRect();
     const x = e.clientX - rect.left;
     const y = e.clientY - rect.top;
@@ -156,8 +154,6 @@ function draw(x, y) {
 function handleTouchStart(e) {
     e.preventDefault();
     
-    const canvas = document.getElementById('simulation-canvas');
-    
     // Check if we have multiple touch points (for dragging)
     if (e.touches.length > 1) {
         isDragging = true;
@@ -180,7 +176,6 @@ function handleTouchStart(e) {
 function handleTouchMove(e) {
     e.preventDefault();
     
-    const canvas = document.getElementById('simulation-canvas');
     const rect = canvas.getBoundingClientRect();
     
     if (isDragging && e.touches.length > 1) {
@@ -208,9 +203,6 @@ function handleTouchMove(e) {
 
 // Set up event listeners
 window.addEventListener('load', function() {
-    // Get canvas reference after it's defined
-    const canvas = document.getElementById('simulation-canvas');
-    
     canvas.addEventListener('mousedown', handleMouseDown);
     canvas.addEventListener('mousemove', handleMouseMove);
     window.addEventListener('mouseup', handleMouseUp);
diff --git a/js/main.js b/js/main.js
index dcd2ed2..3590d2a 100644
--- a/js/main.js
+++ b/js/main.js
@@ -1,6 +1,6 @@
 // Main game variables and initialization
 let canvas, ctx;
-// currentTool is already defined in input.js
+let currentTool = SAND;
 let lastFrameTime = 0;
 let fps = 0;
 let debugMode = false;