I absolutely love the fusion between tower defense and a rhythm game. There’s a neat layer of strategy, where you have to plan an effective layout for your towers, while also making sure it’s a pattern you’ll be able to repeat.
I found the game a bit punishing, though. There are a lot of enemies, and they start coming before you have time to put down many towers. I was basically forced to take damage at the beginning, and later on one mispressed key would cost me dearly. I think you could give the player a bit more time to think. As is, once the enemies started flooding in I forgot about the strategy, and what key did what, and just kind of pressed randomly.