Loved the idea, was expecting someone to maybe make a game with a big sword but wasn't expecting a big gun! I also loved how your shooting gives you momentum, very fun! The only thing I would say is that you could be more lenient with the ammo. A player isn't going to take a perfect shot every time, and so one or two more bullets than required would really help the player out. Also some music would be nice, but apart from that I love it!