Thank you very much for this long feedback.
Me and my Friend are both programmers with low knowledge about colors and art so yea this party has a lot to fix. We wanted to keep it more dark and grimmy but maybe less muddy would be better
The first idea was kinda the thing you mentioned, but using physics to load a bullet was better after initial tests. There is space to make more improvements :D
100% thing that we missed was telling a player which bullet will be shooted in current moment, next game will be better!
Cheers!