I liked this! Perhaps to improve it I don't know if it's the clearest right now that you should move away from the lever and go back into it to effectively press it again. Also, it's possible to randomly go off the edge and it doesn't go to the next level. Other than that I really liked the puzzles and the game felt very unique.
Only other thing I can think of is this game feels like it's almost more relevant to some other theme I saw on the theme voting page when I quickly saw it once, not sure which one it was but this game felt right away like it would have fit that theme really well. It was probably a theme I would have found easier as well is all I know.
I think it works OK for the current theme as well especially due to the story you have in the beginning, but that's also another thing that stuck out to me right away about this game.
Overall really nice job on this game!