I played this the other day. It's not too long, about an hour, but I thoroughly recommend it. The feel of the gameworld is reminicent of Pokémon, but it's just really dark. I found the contrast amusing.
Here's a video (possible spoilers?): http://youtu.be/fKk5mRDDJfw
And here's where you get it from: http://www.freeindiegam.es/2012/03/wither-rastek/