A suggestion to tune the difficulty - the elevator on level 1 (one up), left platform is a too far. I tried many times to jump there and I knew the robot had to go there because I saw the gear from below. But it seemed like it is impossible. I had to use the classical hack - place the character on the edge, most of the sprite hanging in the air to be able to make the jump. The platform should be a few pixels closer. Some players may get too frustrated and just abandon the game. Good luck!