I played about 12 or 15 levels, I enjoyed my time with it! I definitely see the theme, and some puzzles had me thinking for a bit. The level design is very good.
If it weren't for the need to press space, your game would be playable on mobile, which would be an easy and awesome addition. You could consider adding a green button like in Scratch to start the robot. I would have played for a lot longer on mobile 🙂