Reminds me of Seiklus and Cave Story. There's really no challenge but exploring is fun due to fun gameplay (wall jumping!) and great atmosphere thanks to art & music/ambience.
http://knytt.ni2.se/




The Knytt was abducted by an alien! Traveling through space, the UFO flies into a meteor and crashes on a nearby planet. Luckily, the Knytt and the alien survive, but the UFO is a wreck. How can the Knytt possibly find it's way back home again?
http://knytt.ni2.se/



