Really cool game. Reminds me of DomeKeeper on Steam. When I was trying this out the and the build menu is a bit blurry. The difficulty drastically increase when building things, and for example extra turrets felt slow, while lots of enemies spawn hehe. Felt hard to keep up. Maybe could have waves where the player has a little time to prepare in between :D
All in all, a cool game and quite enjoyable! Good job! :)