Pretty good and fun. Had problems with control I always had to try them first to see how robot would move, it wasn't clear to me without trying in which direction it would move.
Robot hand was very slippery for me at first so making first jump on robot hand over spikes was frustrating and took a lot of tries.
I believe there are 2 arcades to be found - one is in level 4 but how do I collect it?
Checkpoints might be helpful.
Best of luck with selling it.