On Steam for fifteen, but right now it's 25% off.
I'm a little over an hour into it and I'm enjoying myself. The sound design and overall feel is amazing. The story feels like it'll turn predictable at any moment, but the narrative had me sucked in so I don't expect it will matter that much.
Well as it turns out, the story wasn't quite as predictable as I expected. In fact, it was damn good. I recommend this to anyone looking for a relaxed puzzle platformer that'll give their brains a proper twist.