A few days ago my friend recommended a game to me, I can't remember what it was and I haven't been able to contact him to ask what it was, I was hoping someone could help me. Apparently each level is in a room, where you basically use physics/science to make a portal to move you onto the next level, presumably solving a puzzle of some sort. Apparently the end is something fantastic and he wouldn't tell me what since that would spoil it, apparently. I think the name began with a P... I know that's not much to go on, but does it sound familiar?