Such a cool game! I really like this type of game! The concept is awesome and have so much depth, the pixel art and animation is so clean and polished. Gameplay is very fun, though I was quite confuse at first when I didn't know you have to restock the towers, maybe make it have some ammunitions by default first would be really nice! I think with some simple sfx and music will be an even better.
Overall super fun game. Great job!