Closure is a game that doesn't exist when you're not looking at it. If that's confusing, then watch the video below and you'll see (or not see) what I mean. The character you control can only move on or interact with surfaces and object that are illuminated by light. If the light moves, that object/surface/doorway is effectively just not there anymore. It's like an ostrich burying its head in the sand: if it can't see it, it's not there. You can carry globes of light with you that illuminate and effectively create your paths through the levels, but it quickly gets much more complicated.
Tyler Glaiel and Jon Schubbe have spent the last three years working on this game while devouring a steady diet of ramen noodles and pizza along with his two . It's a true labor of love, and it evokes the indie feeling of Limbo, along with a sense of wonder at the "It's there / It's not there" mechanic. Most of the puzzles will twist your brain the same way Portal did until you figure out how to progress through the door at the end of each of the "Nearly 100" levels according to Glaiel.
You can actually play the older Flash version of Closure right now, but the version that Tyler and the other devs are working on is being created for the PSN, will feature updated graphics and gameplay, and will be around six to eight hours long. Why would you want to pay for something down the line that's free now? Their FAQ says it best: "The difference between the flash version and this one is the difference between the original Mario Bros. arcade game and Super Mario World for the SNES." Not bad for two game developers and their first project right out of school.
Sony is quietly been assembling a terrific squadron of independent and near-independent titles for the PlayStation Network, and just here at Fantastic Fest they are showing off Journey, Retrograde, Eufloria, Okabu, Papo & Yo, Rochard, Payday, Sideway, PixelJunk Sidescroller, and Closure. That's an extremely impressive list of games that are polished, fun, beautiful (in cases like Journey), emotional, and amazing. Honestly, I haven't paid a lot of attention to PSN exclusive games, but seeing all of these upcoming titles in one place have definitely changed my outlook.