Just played your game and got to wave 5. I really like the sound, and the difficulty curve is pretty much perfect. The only issue I found was all 3 turret types end up being built as the same standard turret. Overall, it's a really nice job!
I'd love some feedback on my game if you get a chance, I'm yet to have anyone playtest it except me:
https://itch.io/jam/brackeys-13/rate/3348009
Cheers!