Hey! I actually really liked this. As a concept it is super neat having your past actions become the bosses attacks now, makes you plan ahead and make sure you're not too much of a threat to yourself. I know theres no music as you said, but ima rate it as if there was, because this is a very cool game!
Communication when transitions might happen would be handy, but other than that I enjoyed it :D
Well done on Submitting! (Btw my high score was 3000)