Viewfinder out on Steam (also 10% off until July 25th)

Really interesting concept. I enjoyed what I played out of the demo, though hopefully in the full game they explain the usage of the camera a little more (most likely in the skipped levels/puzzles)

The discount currently doesn't show for me, but I can see the historical low was 10% off yesterday -- was the deal only for Launch?

Looks cool!
Does this have anything to do with the canceled Valve Portal sequel F-Stop?