Unfortunately the rate of progression just didn't quite work for me, felt like I was replaying levels for ages, but it all worked bug-free and there were plenty of cuties. If this weren't a "one and done" project, I'd give thoughts on what to improve, but as it stands it certainly kept me interested for an afternoon!
Edit: Oh nevermind, I just saw the post about the balance update, I'll revisit and see how it feels