Neat concept! and cute pixel art. Agh, game-breaking bug! Sorry to see that, as the others got stuck on an impossible level. I think that it would be cool if you had more choice over instructions to give the robot. This would increase the depth of the puzzles, as you would need to choose your pieces wisely! I also found that I can move with arrow keys, but the interaction prompt is 'E', which confused me at first. I think some music would be good too, feel free to use an asset pack. I often feel too confident to use pre-made assets but music for me personally is something that seems to be better made by someone else :P
Please go check out my game too :)