diff --git a/engine/lib/Signal.ts b/engine/lib/Signal.ts
index 44ce2ee..b871e6d 100644
--- a/engine/lib/Signal.ts
+++ b/engine/lib/Signal.ts
@@ -21,7 +21,7 @@ export function createSignal<T>(value: T): [() => T, (value: T) => void] {
 	return [getter, setter];
 }
 
-export function createEffect(callback: () => void) {
+export function createEffect(callback: () => void): void {
 	current = callback;
 	callback();
 	current = null;
diff --git a/engine/system/physics.ts b/engine/system/physics.ts
index 66bcf3b..1234659 100644
--- a/engine/system/physics.ts
+++ b/engine/system/physics.ts
@@ -224,13 +224,7 @@ export function moveAndCollide(
 	delta: number,
 ): Array<Collision> {
 	const colliders = $<Collider>("collider")!;
-	const positions = $<Vector>("position")!;
-
 	const self = colliders.get(id)!.value;
-	const pos = positions.get(id)!.value;
-
-	self.aabb.position.x = pos.x;
-	self.aabb.position.y = pos.y;
 
 	const slice = self.buffer.slice;
 	slice.length = 0;
@@ -283,6 +277,7 @@ export function moveAndSlide(
 			continue; // TODO
 		}
 
+		// FIXME
 		// const ts = Math.min(0, time - 0.001);
 		// velocity.x += velocity.x * ts;
 		// velocity.y += velocity.y * ts;
diff --git a/game/entities/hero/entity.ts b/game/entities/hero/entity.ts
index ebe847f..347d279 100644
--- a/game/entities/hero/entity.ts
+++ b/game/entities/hero/entity.ts
@@ -2,7 +2,7 @@ import { defineEntity } from "#/engine/Entity.ts";
 import { keyboardInput } from "#/engine/Keyboard.ts";
 import { createEffect, createSignal } from "#/engine/lib/Signal.ts";
 import { pointer } from "#/engine/Pointer.ts";
-import { createRect } from "#/engine/Rect.ts";
+import { createRect, fillRect, strokeRect } from "#/engine/Rect.ts";
 import $ from "#/engine/Scene.ts";
 import {
 	createSprite,
@@ -10,6 +10,7 @@ import {
 	defineSpriteSheet,
 } from "#/engine/Sprite.ts";
 import {
+	type Collider,
 	createCollider,
 	moveAndSlide,
 	Shape,
@@ -20,6 +21,7 @@ import {
 	scale,
 	type Vector,
 } from "#/engine/Vector.ts";
+import { viewport } from "#/engine/Viewport.ts";
 import charIdle from "#/game/assets/char-idle.png";
 
 const [speed, setSpeed] = createSignal(0.1);
@@ -42,6 +44,7 @@ let onceGuard = true;
 process((id, delta) => {
 	const position = $<Vector>("position").get(id)!.value;
 	const velocity = $<Vector>("velocity").get(id)!.value;
+	const collider = $<Collider>("collider").get(id)!.value;
 
 	if (pointer.isDown) {
 		position.x = pointer.position.x;
@@ -70,4 +73,7 @@ process((id, delta) => {
 
 	velocity.x = 0;
 	velocity.y = 0;
+
+	fillRect(viewport.ctx, collider.aabb, "orange");
+	strokeRect(viewport.ctx, collider.aabb, "red");
 });
diff --git a/game/entities/portal/entity.ts b/game/entities/portal/entity.ts
index e4f7914..d788b00 100644
--- a/game/entities/portal/entity.ts
+++ b/game/entities/portal/entity.ts
@@ -25,12 +25,7 @@ const process = defineEntity("portal", {
 });
 
 process((id, delta) => {
-	const position = $<Vector>("position").get(id)!.value;
 	const collider = $<Collider>("collider").get(id)!.value;
-	const cPos = collider.aabb.position;
-
-	cPos.x = position.x;
-	cPos.y = position.y;
 
 	fillRect(viewport.ctx, collider.aabb, "orange");
 	strokeRect(viewport.ctx, collider.aabb, "red");
diff --git a/main.ts b/main.ts
index 964e0b9..8d52764 100644
--- a/main.ts
+++ b/main.ts
@@ -1,6 +1,6 @@
 import { listenKeyboard } from "#/engine/Keyboard.ts";
 import { listenPointer } from "#/engine/Pointer.ts";
-import { currentScene, setScene } from "#/engine/Scene.ts";
+import $, { currentScene, setScene } from "#/engine/Scene.ts";
 import { animateSprites } from "#/engine/system/animateSprites.ts";
 import { drawSprites } from "#/engine/system/drawSprites.ts";
 import {
@@ -9,6 +9,20 @@ import {
 	resizeCanvas,
 	viewport,
 } from "#/engine/Viewport.ts";
+import type { Collider } from "./engine/system/physics";
+import type { Vector } from "./engine/Vector";
+
+function updateAABBs() {
+	const colliders = $<Collider>("collider");
+	const positions = $<Vector>("position");
+
+	for (const [id, collider] of colliders.entries()) {
+		const position = positions.get(id)!.value;
+		const aabb = collider.value.aabb;
+		aabb.position.x = position.x;
+		aabb.position.y = position.y;
+	}
+}
 
 let then = self.performance.now();
 let delta = 0;
@@ -17,6 +31,9 @@ function animate(timestamp: number): void {
 	then = timestamp;
 
 	resetCtx();
+
+	updateAABBs();
+
 	currentScene.process(viewport.ctx, delta);
 
 	animateSprites(delta);