I adore the artsyle you've got going on and the gameplay feels very fresh and good to play. One small gripe I have though. The transition between the different waves is a little jarring. The way the camera stops and jitters slightly as the new level loads, the music looping at every wave is a bit off too. Maybe this is just a personal opinion but I think it'd be better if it just looped seamlessly. I think a level transition animation would do wonders. Anyways, great job! this is really good stuff.