Cute game! Problems are as others have mentioned - it was a little hard to understand how the robot's pattern changes when it runs into a block, so having to trial-and-error in levels where you have to remove blocks to place them later in the level sometimes felt tedious if not frustrating (since you have to start over and the robot moves slowly). The 'E' key didn't seem to speed it up at all.
Nice job otherwise, I enjoy these kind of games!