I'm really enjoying this game. My biggest complaint is the torpedo system, specifically the way it selects which enemy to shoot at. There have been multiple times when I'm up against a bigger enemy, who shoots something or is racing towards me, but rather than deal with the bigger threat the torpedo shot at a small, relatively insignificant enemy. It gets really annoying.
Great game. My only complaint is with the pause button. I wish you could pause just by pushing p. I had to pause in the middle of the work part, and I got hit a couple of times having to move my guy to the top of the screen to pause. Otherwise great game, a lot of fun.
I know people have said this, but I think it deserves repeating: make the coins stay forever. I just finished the FIRST level, and it's already annoying that I have to either focus on fighting or getting money.