This is a really cool concept!
Some ideas if you tweak it after the Jam - I got to wave 8 with about 70 health - the yellow enemies have way too much hp for their speed in my opinion and I basically only use the cannon - the bow was surprisingly hard to aim - maybe turn it around that you drag towards were you want to aim - should make it easyer and the magic tower felt useless because I could not tell how much dmg it dealt and who it would attack...
But I hope you keep working on it - one of the best TD games this Jam