Looks great and a unique concept!
I had a few issues with this game though...
First play, I wasn't sure what was happening. I didn't know I had a gun available until I read the comments on here... So basically the first game, I was running around with just hands wondering what was going on!? I think the gun should be in your hands to start with.
Second play. I looked down and great - there's a gun! Oh, it's on the right - but I'm left handed... So I picked it up with my right and passed it over to my left, but then I fired it and it launched itself over the floor and I couldn't recover it.
Third play. I grabbed the gun from the right hand side with my left hand so it wouldn't fly out my hand. I then took three shots and it looked like I had no ammo left. I wasn't sure how to reload then... so I couldn't complete the game.
So, I didn't have a great experience unfortunately, but it certainly looked great and the concept itself looks cool.