This is a cool idea! I think you've leveraged the level design well to reflect the power-up and have it operate in new and interesting ways as the player explores the level. There is a little -vania flavour, in the sense that abilities open up accessibility of the world, and discovering you could just jump up all the way in the starting area was a nice discovery. The idea of having the cracked ceiling reveal more spikes, making subsequent attempts harder, was a very devious one! Check out Leap Year for a game that designs its entire experience around an ability like this that continues to use its level design in interesting and unexpected ways for the player. I liked the platforming and spike avoidance approach, but some feedback could be to figure out how to make this a little more precise - as the player is shooting into the air fast, it's hard to align a jump. Great work!