Well, I suppose this wasn't truly meant to be a game, so I'm not going to critique the gameplay. As an engine/demo, I guess it works, but it's not quite as sophisticated as you try to make it seem. The good news is that it does work, and the ability to change the physics and test things out is a nice addition. All in all, i can't really give you full marks because it's a little unfinished, and there's not much that can be done with it. However, since it's a work-in-progress, I'm not going to dock too many points either. I'm curious as to what you intend to with this, and, more importantly, what makes this any different from any other physics engine in any other platformer, but I suppose I'll find out when you finish. Good luck on whatever you're working on. 3/5 7/10