Very creative! I really liked it. And, very didactic on the possibilities on using extensions.
I would just do a suggestion, if you continue this project.
I think you presented the idea of shifting mechanics with On/Off really well, so maybe would be cool to don't have such guided gameplay, letting the player figure it out for himself in some parts.
Could you try my game too? I would really apreciate it.
https://seumemel.itch.io/only-press-space