Wow that was a great game. I really liked the mechanics of the game. Same with the enemies. Simple but effective! The art and colour scheme were nice to look at. Got absolutely cooked by some jellyfish that blended with the ground. If the area around the tower was slightly more spacious, it would be manageable. Would also love some sort of indicator if an enemy was hit or not, be it sound or some hit flash.
Otherwise great job on the game! Was a cool experience.