From A Stream To A Sigh: Stream

Been meaning to play this for a while but finally - ahem - found time. Stream is basically a short-form Braid with a monochrome Flashback-esque aesthetic. The device being you can create a portal and send yourself back in time, leaving a ghost doing whatever you were doing. Use it to dodge guards, keep doors open and so on. It's a lot fiddlier than Braid, which becomes an annoyance in the more complicated multi-stage puzzles, but it's still well worth a shot. You can get it here and see some footage - in the form of a full spoiler-filled walkthrough - below...