I like this idea a lot and the mechanics are very well implemented into the level design. The controls can be a bit clumsy in places - I think the friction/damping values just need some tweaking. Enemies don't seem to be able to aim vertically, so combat is very easy if you just position yourself at a different height to them (or make them big) so that they can't hit you. Fun game, I'm looking forward to playing more levels in the final version.