Braid

Has anyone played this game? It's a pretty obscure game that I think is only found on Xbox Live Arcade, PSN Network and a program with which you download games called Steam. I thought this game was awesome just because it's got one of the most interesting storytelling devices I've ever seen done in any kind of entertainment format. I'd be surprised if enough people have played (let alone heard of) this game enough to know what I'm talking about, but if you've played it and beaten it, how the last level plays out should tell you where I'm coming from.