This concept is fantastic and hilarious!
In that first room I felt like a bad-ass gangerter from the god father, walking through a wall with a tommygun and with one throw, knocking the two thugs to the ground. Then I walked up behind another thug, grabbed him by the crotch and throw him across the roof top knocking down his friend!! This game is funny, does an amazing job with the machanic, has great level design, a fantastic art style, and ontop of that it just is totally bad-ass!
There are a few problems, not with the design, but just standered glitches. One of the main ones I encountered was the gun hitbox, when holding a wepon and spamming the jump button while looking down you are able to fly... this allowed me to sequence break the chopper fight at the end and kill the chopper before it is active, then walk to the ramp and get the gameover text.