Thank you for the kind words!
Balancing is definitely an issue. I've been watching youtube videos about the game (including Nookrium) and no one seems to be able to pass the 3rd wave. There will be some experimental balance changes in the next update.
In about 2 weeks I will be releasing the game on to steam. There will be a discussion board on the steam page where feedback and bug reports can be posted. I'm reluctant to turn the comment section on this page into a discussion board. I don't want to lose the comments.