Great presentation, good, easy to read visuals and killer music. The controls seemed solid to use once I figured them out.
My two big points of constructive criticism are: 1. You made me figure out the controls on my own. (at the time of this writing they don't seem to be explained on the Itch page or in game) I don't play a lot of tower defense games, so maybe this is all standard in that genre, but you can't assume your players will be familiar with your genre! 2. It takes too long, in my opinion, for the enemy waves to ramp up into a challenge. After figuring out the controls, I ended up sitting there for a few minutes just waiting for first level to finish.
As MrScottyTay said, though, I'd definitely be interested in playing a polished up version of this.