Oh noe!
You should be able to solve it by:
[as a square]) go right, press [tab] to turn into a square, and then you should be able to double jump up to the exit when you hit a wall.
[as a circle]) go left, fall down and then start heading right, jump from single block to block until you make it to the exit.
ed. In the end, I added a walk through video (https://youtu.be/9PjaMpKuyCg) just in case anyone else gets stuck
Thanks for giving it a go!