Lots of fun! I'm a sucker for puzzle-y platformers, and this one really has the sauce! The mechanics is easy to understand but tricky to master, and the level design does a great job of testing your abilities. I felt really clever when I found the secret path on the last level :)
My one piece of criticism would be that walljumping could be pretty inconsistent at times. I had to wait a little bit after moving towards the wall before I could jump.