Overall, pretty good! I love the idea of looping through the same level, but adding more challenges each time! I could see this turning into a really cool idea, like making each added challenge a card / tile, it could become visually really cool!
For a platformer, I wish there was some more controls to make it feel tighter and more fun to control my character- like variable jump height, pressing the jump button before hitting the ground still lets me jump, coyote time.
Otherwise, great job with the game! I would love to see more ideas like this!