Thanks so much for the in depth feedback. You bring up a lot of good points. I've had a few people recommend a "hover to show tooltip" which I wish I would have thought of. More battle sounds for enemies is also good feedback. I was worried that with the constant clicking and other sounds it would be too much, but I do agree that making the battle feel more prominent is a good idea.
I am a bit confused about your comment on the money though. As far as I know it works as you describe? Every time it's leveled you get 1 money. Is your recommendation that every time it's clicked it increases?