===================================================================
--- original.js
+++ change.js
@@ -1,30 +1,27 @@
-var BloodsplatterEffect = Container.expand(function (parent, x, y, velocityX, velocityY) {
+var BloodsplatterEffect = Container.expand(function (parent, x, y) {
 	var self = Container.call(this);
 	parent.addChild(self);
 	self.x = x;
 	self.y = y;
-	var startTime = LK.ticks;
 	var duration = 60;
-	var maxSize = 200;
+	var remaining = duration;
+	var maxScale = 2.0;
 	var startAlpha = 0.75;
-	self.update = function () {
-		var elapsedTime = LK.ticks - startTime;
-		var progress = elapsedTime / duration;
-		if (progress >= 1) {
+	self.update = function (velocityX, velocityY) {
+		var progress = --remaining / duration;
+		if (progress < 0) {
 			self.destroy();
-			return;
+			return true;
 		}
-		var size = maxSize * progress;
+		var scale = 1 + (1 - maxScale) * progress;
 		var alpha = startAlpha * (1 - progress);
 		var graphics = self.createAsset('bloodsplatter', 'Bloodsplatter graphics', 0.5, 0.5);
-		graphics.width = size;
-		graphics.height = size;
+		graphics.scale.set(scale);
 		graphics.alpha = alpha;
 		self.x += velocityX;
 		self.y += velocityY;
 	};
-	return self;
 });
 var Monster = Container.expand(function (parent, x, y) {
 	var self = Container.call(this);
 	parent.addChild(self);
@@ -51,9 +48,9 @@
 	shadow.width = graphics.width * 0.9;
 	shadow.height = graphics.width * 0.45;
 	shadow.tint = 0x000000;
 	shadow.alpha = 0.5;
-	function update(player, velocityX, velocityY) {
+	function update(velocityX, velocityY, player) {
 		var dx = player.x - self.x;
 		var dy = player.y - self.y;
 		var distSqr = dx * dx + dy * dy;
 		var updateCurve = (-Math.sin(++updateTick / updatePeriod) + 0.5) / 1.5;
@@ -103,9 +100,9 @@
 	backShadow.width = graphics.width;
 	backShadow.height = graphics.width * 0.25;
 	backShadow.tint = 0x000000;
 	backShadow.y = -3;
-	function update(player, velocityX, velocityY) {
+	function update(velocityX, velocityY, player) {
 		var dx = player.x - self.x;
 		var dy = player.y + collectOffset - self.y;
 		var distSqr = dx * dx + dy * dy;
 		if (self.active) {
@@ -477,9 +474,9 @@
 			}
 		}
 		for (var i = pickups.length - 1; i >= 0; i--) {
 			var pickup = pickups[i];
-			if (pickup.update(player, velocityX, velocityY)) {
+			if (pickup.update(velocityX, velocityY, player)) {
 				interface.changeScore(1);
 				pickup.destroy();
 				pickups.splice(i, 1);
 			} else if (pickup.y < -(tileSize / 2 + tileMargin) || pickup.active && player.hitbox.intersects(pickup.hitbox)) {
@@ -487,17 +484,16 @@
 				pickups.splice(i, 1);
 			}
 		}
 		for (var i = effects.length - 1; i >= 0; i--) {
-			effects[i].update();
-			if (!effects[i].parent) {
+			if (effects[i].update(velocityX, velocityY)) {
 				effects.splice(i, 1);
 			}
 		}
 		for (var i = monsters.length - 1; i >= 0; i--) {
 			var monster = monsters[i];
-			if (monster.update(player, velocityX, velocityY)) {
-				effects.push(new BloodsplatterEffect(self.parent, self.x, self.y, velocityX, velocityY));
+			if (monster.update(velocityX, velocityY, player)) {
+				effects.push(new BloodsplatterEffect(self, monster.x, monster.y));
 				monster.destroy();
 				monsters.splice(i, 1);
 			} else if (!monster.jumping && monster.hitbox.intersects(player.hitbox)) {
 				interface.changeLives(-1);