A mobile game is a video game played on a mobile phone. The game market for mobiles is clearly regarded as a market with a future [11], as the multiple investments carried out by the large world editors on this segment testify. The mobiles are true platforms of large and general public games: mobile games can be downloaded via the mobile operator's radio network, WLAN, bluetooth or USB connection. Mobiles phones give game developers a unique set of tools and behaviours and with a little creativity, game developers can make some really great games for this platform. The challenges posed by portable devices are numerous, but the biggest complaint of many in the industry is the lack of standards. It is necessary to adapt each game to the various models of existing terminals, which do not offer the same features (memory, processing power, keys...). Consequently, the number of different versions of a game rises to several hundreds. As we will see, Java Micro Edition (J2ME) attempts with some success to solve these problems.