First I would like to say that I really enjoyed this game i genuinely gave you five stars for fun however there are a couple areas for improvement first i think you should develop some for of time based scoring system which is displayed as well as a health bar. You should also increase the amount of enemies needed to obtain a tower because you can get a lot of towers and lastly you should make rock towers less OP I literally beat the game with two fire towers and lots of rock ones.