Thanks for the detailed comment!
Sound is really a big flaw in this game and my biggest disappointment, game could be multiple times better, but i just didn't have enough time to write a proper sound system :(
Also lack of tutorial and timer in game caused by absence of text rendering in my engine, didn't have enough time and experience!
Bleeding enemy corpsed is the feature - need to shoot carefuly on later stages, but this need more polish.
Glad you endure it to the end!