Portal was a full on 3D, space shifting game where Shift Extended is like its 2D cousin where the world is literally black and white and you have the ability to shift from one to the other, shifting 
gravity along the way, to solve environmental puzzles. As with all Playstation Minis the games can be played on both your PS3 and your PSP. I sat down and over the course of a week played through all 120 levels of the game because it was that interesting and fun.
As I said there is only black and white in the world of Shift Extended so the graphics aren’t going to win any awards. But that doesn’t matter because the gameplay is exceptional for the most part. Each level is an environmental puzzle that you must solve as quickly as possible (only for scoring purposes). The puzzles are solved by shifting from the black to the white which allows you to navigate the level, avoid the hazards, and unlock things as needed to get to the exit.
The written dialog in the game indicates that you are a test subject of some sort and these are experiments. But really, it’s a more sinister, Portal-like experience and in fact, a lot of the dialog could exist in a game in that series so it was slightly derivative in that respect.
