Strange World: Castaway is a puzzle-platfor game, where the most important thing is vibe. In SW:C you are taking control on an alien, which has some special skills. He can slide on the walls, he can double jump, etc. Your main task is to find way out from caves and collect all missing parts from your spaceship.
It's a full version of SW:C. More info on swc's website and in news on moddb