XDriller

Puzzle game for children (and not only). In this game you control cute animal that clears colored squares. Although the description is reminiscent of Tetris, it is definitely different. You actually clear same colored squares on your way out of the level (see the video below).

Besides the nice penguin you can choose to play with a fox.
The number of different levels is virtually unlimited because they are generated randomly. This will never let you get bored by the same level again. There are also several pre-built adventure levels.

And one more thing - the game is portable. In other words, it can be played from a USB thumb drive, for example, without saving anything on the hard drive of the computer. That makes this game very suitable for office computers ;)