It looks like your game isn't bad judging by the other comments, but the glitched (or unintuitive-if-intentional) invest button dissuaded me within minutes, and the lack of mouse support put me on a bad start to begin with on top of that.
Instructions:
Invest button converts all damage done into money, but you lose any leftover cash when you do.
Understood at this point. However, I would suggest having that information expressed within the game itself.
