===================================================================
--- original.js
+++ change.js
@@ -124,9 +124,9 @@
 	self.update = update;
 	self.squash = squash;
 	;
 	function update(args) {
-		var {interface, player} = args;
+		var {columnList, interface, player} = args;
 		var destroyNextTick = false;
 		var upperBox = column.boxes[self.index + 1];
 		var shadowVisible = upperBox && upperBox.falling;
 		shadowGraphics.visible = shadowVisible;
@@ -144,18 +144,21 @@
 				self.y = targetHeight;
 				speed = 0;
 				column.count++;
 				column.squash(self, self.index - 1);
-				column.boxContainer.addChild(self);
+				column.addChild(self);
 			} else if (player.intersects(self.hitbox)) {
 				switch (type) {
 					case 'gold':
 					case 'points':
 						destroyNextTick = true;
 						self.active = true;
 						break;
 					case 'tnt':
-						self.active = true;
+						if (!self.active) {
+							self.active = true;
+							self.countdown = TNT_COUNTDOWN;
+						}
 					default:
 						if (!player.invulnerability) {
 							interface.gameOver();
 						}
@@ -171,8 +174,44 @@
 				case 'points':
 					interface.increment(POINTS_GAIN_PICKUP);
 					break;
 				case 'tnt':
+					if (self.countdown !== undefined) {
+						if (--self.countdown <= 0) {
+							self.alive = false;
+						} else if (self.countdown % 30 === 0) {
+							LK.effects.flashObject(self, 0xff0000, 500);
+						}
+						var min = self.y - BOX_HEIGHT * 1.25;
+						var max = self.y + BOX_HEIGHT * 1.25;
+						for (var i = column.index - 1; i <= column.index + 1; i++) {
+							var col = columnList[i];
+							if (col) {
+								for (var j = 0; j < col.boxes.length; j++) {
+									var box = col.boxes[j];
+									if (box.y > min) {
+										if (box.y < max) {
+											if (box !== self) {
+												switch (box.type) {
+													case 'stone':
+														break;
+													case 'tnt':
+														box.active = true;
+														box.countdown = 0;
+														break;
+													default:
+														box.alive = false;
+														break;
+												}
+											}
+										} else {
+											break;
+										}
+									}
+								}
+							}
+						}
+					}
 					break;
 			}
 		}
 		if (!self.alive) {
@@ -188,11 +227,16 @@
 			switch (type) {
 				case 'gold':
 				case 'points':
 					self.alive = false;
-				case 'tnt':
 					self.active = true;
 					break;
+				case 'tnt':
+					if (!self.active) {
+						self.active = true;
+						self.countdown = TNT_COUNTDOWN;
+					}
+					break;
 			}
 		} else if (target.type === 'stone') {
 			switch (type) {
 				case 'gold':
@@ -200,28 +244,28 @@
 					self.alive = false;
 					break;
 				case 'tnt':
 					self.active = true;
+					self.countdown = 0;
 					break;
 			}
 		}
 	}
 });
-var Column = Container.expand(function (x, y) {
+var Column = Container.expand(function (x, y, index) {
 	var self = Container.call(this);
 	self.x = x;
 	self.y = y;
 	;
 	var boxes = [];
-	var boxContainer = self.addChild(new Container());
 	var countdown = SPAWN_INITIAL + getCountdown();
 	var shadowGraphics = self.createAsset('shadow', 'Shadow image', 0.5, 0.5);
 	shadowGraphics.alpha = 0.5;
 	shadowGraphics.y = STAGE_HEIGHT - FLOOR_OFFSET;
 	;
 	self.count = 0;
 	self.boxes = boxes;
-	self.boxContainer = boxContainer;
+	self.index = index;
 	self.squash = squash;
 	self.remove = remove;
 	self.update = update;
 	;
@@ -380,9 +424,9 @@
 var PLAYER_GRAVITY = 0.5;
 var PLAYER_JUMP_SPEED = 20;
 var PLAYER_MOVE_SPEED = 15;
 var SPAWN_OFFSET = -100;
-var SPAWN_INITIAL = 5 * STAGE_TICKS;
+var SPAWN_INITIAL = 3 * STAGE_TICKS;
 var SPAWN_CONST = STAGE_TICKS / 2;
 var SPAWN_VARIANCE = 10 * STAGE_TICKS - SPAWN_CONST;
 var SPAWN_COUNT_VARIANCE = STAGE_TICKS / 4;
 var SPAWN_TNT_CHANCE = 0.03;
@@ -394,8 +438,9 @@
 var INVULNERABILITY_TIME = 5 * STAGE_TICKS;
 var INSTRUCTION_DURATION = 5 * STAGE_TICKS;
 var BOX_SPEED = 5;
 var BOX_GRAVITY = 0.2;
+var TNT_COUNTDOWN = 2 * STAGE_TICKS;
 var FLOOR_OFFSET = 100;
 var COLUMN_VOLUME = Math.floor((STAGE_HEIGHT - FLOOR_OFFSET) / BOX_HEIGHT) + 1;
 var BOX_SETTINGS = {
 	basic: {
@@ -426,19 +471,19 @@
 };
 ;
 var Game = Container.expand(function () {
 	var self = Container.call(this);
-	var background = self.addChild(new Background(self));
 	;
 	var lastTouchX = null;
 	var lastTouchY = null;
 	var touchTime = null;
 	var boxList = [];
 	var columnList = [];
 	;
+	var background = self.addChild(new Background(self));
 	var floor = self.addChild(new Floor(STAGE_WIDTH / 2, STAGE_HEIGHT));
 	for (var i = 0; i < NUM_COLUMNS; i++) {
-		columnList.push(self.addChild(new Column((i + 0.5) * BOX_WIDTH, 0)));
+		columnList.push(self.addChild(new Column((i + 0.5) * BOX_WIDTH, 0, i)));
 	}
 	var player = self.addChild(new Player(STAGE_WIDTH / 2, STAGE_HEIGHT - FLOOR_OFFSET - PLAYER_SIZE / 2));
 	var interface = LK.gui.topCenter.addChild(new Interface());
 	;
@@ -487,21 +532,23 @@
 		var columnArgs = {
 			game: self,
 			boxList
 		};
-		for (var i = columnList.length - 1; i >= 0; i--) {
+		for (var i = 0; i < columnList.length; i++) {
 			columnList[i].update(columnArgs);
 		}
 		;
 		var boxArgs = {
+			columnList,
 			interface,
 			player
 		};
-		for (var i = boxList.length - 1; i >= 0; i--) {
+		for (var i = 0; i < boxList.length; i++) {
 			var box = boxList[i];
 			if (box.update(boxArgs)) {
 				box.destroy();
 				boxList.splice(i, 1);
+				i--;
 			}
 		}
 		;
 		if (LK.ticks === INSTRUCTION_DURATION) {