Have you actually read the game proposal? It's aimed to be just as autistic-friendly as Minecraft. Only you'll be hauling bytes around registers in a sci-fi setting to manage a spaceship(or make shitty games/applications), instead of blocks around a blocky world in a bland setting to build houses(or giant cocks/computers).
Not that I like Notch, but he's not stupid in any way. He's a very smart asshole.