It's a cool system, although I may be a scrub, because I only played in God mode. 4 HP for enemies with machine guns was a little hard ;_;
I wonder if you could streamline the item stuff a little bit. Managing your weapons feels a little clunky right now. Shooting guns feels juicy though, I really like that.
The get-sucked-into-space-after-breaking-the window mechanic was easily the coolest part of the game. I hope you add more stuff like this.