Edit:
Here is my v1.2 playthrough. I attempted to speed run v1.2
I did find a new bug. At the title screen if you pause then reset the level, there will be a overlapping second music track that starts.
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First of all I love the art style. I think giving the robot a single wheel instead of legs adds a lot of character to it. I liked the majority of the puzzles and how well you taught new mechanics . The one puzzle that gave me the most trouble was the one with the big red box. Once I figured it out I had that "ahh haa" moment and also "I'm an idiot" feeling.
There were some puzzles that after solving it, the pacing felt a bit sluggish having to wait for a platform to move or a door to open.
On my second play through I looked for bugs and short cuts. I found a few, some you might already be aware of. I recorded my third play though showing some of them. Testing GMTK's Untitled Magnet Game.
I really hope you eventually turn this into a full game :)