Very good game! I like how limiting the player to one jump made you have to design an alternative way to get around; hugging a wall to climb it is a very clever solution to that and worked well! When I was trying to think of ideas at the start I wanted to do something similar but instead of jumps it was only being able to pick one direction you could move but it just didn't seem to work that nicely because I didn't have a something like how you have wall hugging to still allow the player to do enough stuff to make it interesting.