It's nice that you didn't make another platformer with hidden platformers and obstacles. However, continuously changing to more awkward controls is also bad for the user experience. You could improve the game by using a normal control setup and moving it left and right (like wasd, esdf, tfgh). The art is pretty simple, but the trail effect is cool. Though the music is pretty repetitive. Lastly, it's nice that there are lots of levels and variety in the levels.