I like the approach you took with the theme, very creative. The concept is very cool too, the idea of solving puzzles by extending and retracting your kite.
I found the use of spacebar to be a bit challenging since I knew I could jump, and my default instinct was to hit spacebar every time i wanted to jump, but i just ended up opening my kite all the time. Maybe another key for deploying the kite would be better?
Nice work!