Probably the cutest take on Space Invader I've ever seen! The art is great, especially love the effect of the cats being pulled together! The music is a bop and fits the game perfectly!
I will say, the strategy of going back and forth while constantly pressing space got me through the game losing only 10 hp. I think you can make it a bit harder. I also didn't figure out how to defeat the boss right away and it was more of a happy accident.
It's a very impressive game and is extremely polished! Great job!