John Sietsma is a game developer who is creating a game on the Layar platform called Jewel Collector. This game, which is still in development, is the first of it’s kind and will be demo’d at  Mobile World Congress by Layar.

The purpose of the game is to collect as many points as possible. Points can be earned by collecting jewels which are scattered around the MWC exhibition area. You can collect a jewel  by walking up to it. Every hour a new round is started and winners of the hourly rounds can be seen on a score board.

So if you see people running around the exhibition holding their phones up you know what they are doing. They are playing the Jewel Collector!

Some demo shots: