It's gorgeous. Intended to play for a while last night, and was captivated for hours.
I discovered a species of llama with a tongue for a face, and a terrifying, fat, six legged camel with a strange doll head. I've hidden in caves to try desperately to keep warm, and fought off space pirates in a dogfight. I've discovered strange alien artefacts and spent ages shooting at rocks.
It's clearly a game that's going to divide people between "but what am I supposed to do, there's no plot its just collecting things" and "my God, there's so much to do".