So, in level 2-1 and beyond, theres a trick that the WR does where they seemingly just look at the ground and walk a little bit, and then the puzzle is solved. How do they do that?

The way that the puzzle is intended to work is that once you turn on the red, blue and green switches, you can stand in the perfect spot to be able to see the image and it will become reality. It is difficult for a player to stand in the exact spot needed for the illusion to work, so the game will pull you into the perfect location once you get close after turning on all the levers.

As it turns out though, the trigger to activate the illusion is always there, so you just need to be able to stand in the perfect spot for it to activate. This is quite difficult though because without the levers on the game will not pull you into the perfect spot.

The reason you see peoople look at the ground is because they are trying to position themselves correctly by using the ground texture as a reference for position but you do not need to look at the ground for the skip to work.

I'd reccomend doing the level normally until you get pulled into the pefect spot, then look at the ground to see where you end up as a reference for where the trigger is.