N+ (and I believe Super Meat boy as well) don't use pixel-level physics and rely on AABB collisions and computations. There's even a tutorial published on how t

N+ (and I believe Super Meat boy as well) don't use pixel-level physics and rely on AABB collisions and computations. There's even a tutorial published on how the original N game resolved basic collisions and physics: http://www.metanetsoftware.com/technique/tutorialA.html http://www.metanetsoftware.com/technique/tutorialA.html