Good game overall! as a 1-bit game, the art is pretty good. One thing is sometimes(especially the first time) when you die, the restart text is overlaps with the wall and hard to read. Another thing is I don't quite like it force me to stop at the place to teach me to jump. I'll get stuck if I don't jump later, but stuck me before that will only waste the time.
One last thing.. the level is so hard for someone who is not good at platformer :'( I guess it's my problem though...