I really liked your game, especially the atmosphere and sounds. Sometimes I felt like it didn't respond as I expected it (Doublejump for example), but maybe it was just the pressure because I didn't want to fall down, haha.
I think a "safe" space where you learn the movement without losing all the progress would be a good addition, maybe with a floor where you can climb up to where you came from? Otherwise great work, felt very "strange" :)