diff --git a/prosperon/sound.cm b/prosperon/sound.cm
index 63b5c85c..0b40b138 100644
--- a/prosperon/sound.cm
+++ b/prosperon/sound.cm
@@ -92,6 +92,6 @@ function pump() {
   $_.delay(pump, 1/240)
 }
 
-pump()
+//pump()
 
 return audio
diff --git a/prosperon/tilemap.cm b/prosperon/tilemap.cm
index b935a256..457a3a09 100644
--- a/prosperon/tilemap.cm
+++ b/prosperon/tilemap.cm
@@ -66,19 +66,28 @@ tilemap.prototype =
     // Ensure array exists up to x
     while (this.tiles.length <= x) this.tiles.push([]);
     
-    // Convert string to image object if needed
+    // Convert string to image object if needed, or handle null to remove tile
     if (image && typeof image == 'string') {
       var graphics = use('graphics');
       image = graphics.texture(image);
     }
+    // Note: if image is null, it will remove the tile
     
-    // Set the value
+    // Set the value (null removes the tile)
     this.tiles[x][y] = image;
     
     // Mark cache as dirty when tiles change
     this._dirty = true;
   },
   
+  clear() {
+    this.tiles = [];
+    this.offset_x = 0;
+    this.offset_y = 0;
+    this._geometry_cache = {};
+    this._dirty = true;
+  },
+  
   // Build cached geometry grouped by texture
   _build_geometry_cache(pos = {x: 0, y: 0}) {
     var geometry = use('geometry');