"nostr-space-position" is a tag now, kind 1 as answer to the first post;

kind 0 is loaded as profile, your npub is converted to bytes to have its position;

kind 7 (reactions) "materializes" antimatter particle (red sphere in high velocity that kills if touches you;

kind 40 (channel creation) is showed as "black hole" (giant black sphere that kills you if you go there);

Shoots and movements at kind 29211 (ephemeral) with their tags ("nostr-space-movement" and "nostr-space-shoot")