Wow. I normally don't care for tower defense games, but this one was really good! I love that you kept it simple and focused. The way it scaled gave me a little too much confidence in the beginning and then the waves had me on the edge of my seat, lol. I *almost* survived wave 16... But I think I spent too much early on.
So far, this has been the most enjoyable game I've played from the Jam. Great work.