Monochrome iPhone puzzler Shift 2 goes free for a day
It doesn't matter if you're black or white
Armor Games's platform-puzzler Shift 2 is free for a day in association with FreeAppADay.
Taking on the role of protagonist Subject 32767, you have to avoid spikes, find keys, and navigate your way to the exit of each stage.
Shift 2 contains over four hours of gameplay, spread across 120 levels, 30 bonus levels, and several special levels that you unlock by scanning bar codes with your iPhone's camera.
There's also full Retina display support, 34 achievements, and leaderboards through OpenFeint and Game Center, and the game lets you post high scores to Facebook and challenge friends.
The Windows Phone 7 version received a coveted Pocket Gamer Silver Award at review.
Shift 2 will return to its usual price of 59p/99c tomorrow.