It's a very good concept, the game is fun and enjoyable and its a cool twist on the power defence. I think it's a good base to expand on. Obviously as others have said, the waves are too long and it's too simple to actually plan anything but It was actually fun the hear the created beat. In all, its a very good entry!
Thank you! :D & completely agree just didn't have time to complete the stamina system and make adjustments to waves. Pushed a small update today that fixes some of those issues and makes it much more challenging and balanced.