Really cool game! The controls are in most cases fantastic. I just had trouble to learn how to wall jump, but I get the feeling that this is just me sucking at platformers... The background music is great. The design is minimalistic, but functional. I think you will add here more later.
I also like the tutorial with the texts showing up while you go on the edges of the game. I just hope nobody gets stuck on the start screen trying to click on the tutorial... (I didn't, but I could imagine, some might...)
My nerves are too weak for such games, so I didn't play for too long, but I can see that this is going into a very good direction and could imagine that the final game will find its fan base!