It's just a Text File
it's not a game sadly, it's just a 3d model :(
it's for the PicoCAD Jams, & PicoCAD stores the model as a txt file
https://lucatronica.github.io/picocad-web-viewer/#AYTIAxHIAhJCuQIsgGJgSAkKAITtGk...
click the link if you wanna view it without having to download PicoCAD