Gish has been around for a while now, it's probably one of the most unusual platform games I've ever seen. You take control of a blob that can climb walls and stick to the ceiling, avoiding enemies and overcoming obstacles to reach the end of each stage.
I've not played it much to be honest but I'm mentioning it now because they've got a "Pay wot you want!" Offer on, which is certainly a big trend out there right now for independent titles (at least it's good for us though right?)
Anyway, what you all want is a trailer and a link, am I right? Well first off here's a link to the pay what you want page for Gish, and immediately below are moving pictures for your viewing: