Super clever idea!! Honestly refreshing. I love physics based games and puzzles. That plane tricked me for a good few seconds, thought I had whiffed it. My main suggestion (and maybe it's nitpicky) is the character speed, I kept wanting to move faster to go pick things up and place them for testing out the machine.
If you have a chance this week to try my game out, I would love any and all feedback to improve gameplay!