When I find some time in a couple days, I will fix all those collision bugs. At the moment I'm using point v. AABB for collision because it's easy to implement, but i'll switch it to sphere v. AABB. That should pretty much eliminate all the collision troubles. I'll also add a speedrunnning mode with integrated timer, so if you want to, you can check in on the game in a week or so and try to get a world record or two :P