If you're looking for a puzzle game with a difference, then it's worth installing Meon on your Pocket PC.
In 1997, Professor Tagishaki, from Tokyo Quantum Mechanics institute, found new elementary particles that he called Meons. This puzzle game sees you try to solve 120 levels to free the Meons. Of course, the back story is complete rubbish, but Meon does make for a highly entertaining time-waster.
The game is all about placing your light sources in the right place to shoot beams of light towards the trapped Meons. The problem is that many of the Meons can only be freed with a certain color of light, so you'll need to utilize prisms, splitters and filters in order to solve the puzzles. Once you've passed a puzzle you automatically move onto the next level.
The graphics in Meon aren't particularly advanced but the controls are very easy, making this a perfect game to pick up and play on the bus to work. Your progress is automatically saved, so you don't need to restart from the beginning every time.
Give your brain cells a real workout by installing this addictive puzzle game.