Piece12 is a puzzle kind of mind game that can be played by all the people older than six years old. The idea behind the game is completing a puzzle in the required way. Game has twelve different shaped pieces and different shaped boards. At the beginning of each level user is given a partially filled board with fixed pieces on it and remaining pieces as free for user to fill the gaps on the board with them. If user achieves to fill the board with no holes on it, then it means the level is finished and user may move on to the next level. There are three different game modes: classic, memory and time race, and each mode has different levels that gets harder progressively.