The game has a unique concept, nice music and art, but the gameplay didn't really click for me. The game didn't really ramp up in difficulty so I'd never get hit unless i wanted to become stronger. Either way, it's a good game!
Thanks for your feedback, Maybe the actual spawn rate was the weakest point. And you are totally right. Difficulty gradually increasing would make the player use the buffing ability and be a much more fun experience. Thanks for your review! :D