Very fun, unexpected, and challenging platformer! I like how you do different unexpected things like throwing player in the air and making platforms disappear. Our games have something in common in this regard. :-)
I think first-person controls in your game are nice, but to make camera movement more responsive (which is very important in a 3D platformer), I suggest you completely disable mouse smoothing and add an option to disable Vsync.
You probably won’t get in trouble with the Big N due to the scope of your game, but I’d still watch out, they can be out there looking for you. :-P
