Combining with enemies to make seven? That's cool! I had a similar idea when I made a dice-themed game for a jam. This was a neat entry with charming art!
Unfortunately, the platforming was quite unpleasant: both slippery and heavy, and made much, much worse by the consistent slowdown. With how much lag there is, and with how big the character sprite is, I think there should have been at least a frame or two of coyote time.
Considering how difficult the levels are, I'm not sure why it uses a three-lives system. It could have simply subtracted a large amount of score upon death.
All-in-all, good work! Congratulations on the submission!