I really loved it! The mechanio is really clever and works surprisingly well for a jam game! It was really fun to mess around with it and I love how systemic it is with all the elements that can looped, super super cool.
The graphics lack a little of polish and lighting but they work well and give the mood of the game (Portal vibe is here ahah) and the audio is real nice with the music too, just the “nope” sfx that is too aggressive in my opinion ^^
You can be proud that is a really creative and original use of the theme in the game design!
Just, the tutorial didn’t work for me as you said, glad there was a level selection screen. I also got stuck in level 15 I think because I couldn’t remove the sphere from the button and couldn’t climb back, luckily, there was a level selection screen xD
And the transitions between levels could be seamless that’d be nice but that seems to be what you intended to do ^^
Overall really good, congrats! One of the bets jam games I’ve played ^^