Cool and unique game idea! The controls are smooth and art/animations are good. I was confused about what objects are damaging (the blue circles didn't seem to do damage, but everything else did?) and also what the current progress is (I thought phase 1 was going to be endless then suddenly got hit with phase 2, and spent a long time on phase 2 with no idea what happens next). Also I thought that blue circle thing did damage in phase 2 because it knocked me back, only to realize later that touching that progressed/changed the boss's attacks.