It’s over a decade old and hasn’t had an update in equally as long, but I really like playingMe And My Shadow from time to time. It’s a 2D platformer where you have to control 2 characters, but the darker shadow version of you can only move if you record their movements by pressing the space bar and moving/interacting with objects and pressing space when you’re done to see it move.

It also has a built in level editor and a couple of levels/level packs made by other players.