TACOWASA059 has introduced a specific modification for Minecraft that allows you to turn the protagonist into a "magnetizing ball."
The player starts rolling around the world and collecting blocks around himself in the spirit of Katamari:
You can "magnetize" a variety of blocks — earth, snow, sand and more, the mechanic also works in the Nether.
TACOWASA059 has published the "katamariio" mod for Minecraft in open access.