The visuals are amazing and the color palette is very interesting.
Technically the use of anti-aliased images, blur and some alpha effects break the 3 color rule. You could fix that with a dithering shader on top of your canvas.
I ended up in a room with 3 buttons where I guess there was a little square piece that was supposed to fall from the top conveyor belt but it got stuck on the way and I didn’t know how to progress.