There are already solutions for most fo the difficult puzzles somewhere in the comments (even though I remade "go home", the trick is still the same), and they're both optional.
For "Go home", one of the previous puzzles has shown you a setup to force the character to visit a square where you can't place a button.
"Full circle" is really more about execution than a specific trick, and there are many solutions, but pushing a box onto the goal and making it immovable from all directions for a time with three walls and one box is a part of them all. After that, it's mostly a matter of adjusting the puzzle until you find a way to remove all the shortcuts.