Soukoban
A version of the classic Sokoban game. I haven’t played this version, but most of them start out very difficult and only get harder and more complex. It can be a fun game, the type with extremely simple rules and complex strategies… except that many versions get too hard, too quickly.
Even if you haven’t played any version of it, the object should be familiar- push blocks around so that they’re all on their marked spaces. You can’t pull them. Often, you play as a warehouse worker doing this (Sokoban literally means warehouse keeper.)