yeah, I noticed too. Want to see some form of explanation, but it might just be they're from an asset store do that's why.

Clearly the stuff in this game are assets from Planetcrafters. Not thrilled about it, but it will do I suppose for now, it's a demo afterall.

Planet Crafter is a game made 80% from public paid Asset Store assets. We will try to replace these common paid assets by the release.
But for now I suggest we can stop at the fact that Planet Crafter uses some of Lonely Space assets)