I liked this platformer, it was very on theme; for some reason ,the graphics (I think they might have been scaled up) looked fuzzy rather than crisp, but it was bearable.
After getting the first crystal though, the next button did not do anything for me, so I was unable to get to the other two crystals.
The only complaint I had was that the hitbox for the enemy (the one I must avoid contacting) was too large.