This is a tech demo / proof of concept, promoting the SDK or whatever they're selling (PocketJS). It's for game developers, not gamers.
They've written a reasonably non-trivial 3D game in TypeScript and got it running on the PSP with 24MB of RAM and basically an obsolete CPU at 60fps.
I took the bait too and responded to this post, but it’s the third “green” screen name I’ve seen in the last couple days with the same text in the bio:
“When dang and tomhow ban all of us humans, only bots will remain”
So I’m afraid we’re responding to a bot face palm