This level seems easy compared to the levels before it, which has a strong theme of 'manipulating the state above ground level', but in this one I just got the vertical donut away from the wall, then just got down to the ground and put everything into place without much of a sweat. Is this intended? I may just be paranoid because I didn't struggle trying to solve a puzzle for once haha...

I don't want to play with full screen

https://steamcommunity.com/sharedfiles/filedetails/?id=3187276528 Yesterday I was able to play properly. When I just started it up, this screen appeared

I want R key to restart the level.

Sometimes, the regular undo will automatically turn into fast undo even if I'm not pressing anything except Z. I don't know what triggers this, I just know that it will occur if I have played long enough in one session.