This was really cool! I mostly liked how the instruments would add to the soundtrack that was playing as the turntable spun. That gave the game a really unique feel. The position bonuses helped as well. And the way that each level theme corresponded to the enemies was really cool.
Other than that, this was just a pretty solid tower-defense style game. After I lost, I didn't feel a huge drive to go back. Each round took a while, and there was little to actively do during the combat rounds. If I could play as a little dude and actively take part in the defense in some way, that would help things a lot for me personally... could just be that I'm not all that into tower defense.