Unironically it's Sokoban.
The game is so autistic that the only active discussion forum for it is a freaking mailing list. It's too autistic even for Discord servers.

Also, the preferred method of playing it is using a desktop application called "YASC", or Yet Another Sokoban Clone, which automates the vast majority of the player input. Gameplay in YASC is automated to the point that you don't even control your character directly, you just click on the blocks you want it to move. You essentially never solve the puzzles by hand.

The game itself is pure monotony and essentially has no start nor end. You just keep doing levels that get progressively harder. Eventually you'll find yourself writing python scripts and bruteforcers to solve other people's creations, most of which were made with similar bruteforcers to make them as difficult as possible.