To be honest it wasn't much fun to play...
The fact you chose the straight flag is unexpected and original, and I like how you almost gave it a film noir aesthetic, but the game itself doesn't really carry its concept.
The gameplay is very rigid and confusing at the same time, your bullets bouncing all over the place end up just making a mess of everything, I can't understand where the enemies come from, it's really confusing overall.
I hope I at least gave you some useful information to keep in mind for your future works !