I like it! Great concept and the infinite waves plays into the theme well.
However, I feel like the boss moves a little slow so it's hard to get to ranged enemies. Ability 1 never ever goes in the direction I want and it feels kinda random. I think it would be better if the boss doesn't move during attacks as the sliding looks abit off. I think the bloom can be turned down a notch as it is a bit painful to lookat.
Nonetheless, great job overall!