Back when my dad had a Pocket PC, he used to have an awesome game on it called snails. Basically, two teams of snails would try to eliminate each other. It was very funny. They would use weapons like napalm, rockets, mortars, shotguns, biological warfare (salt bomb) and nukes. This would be the PERFECT game for the ipod touch since the pocket PC was also based on a touch screen. Here are some screenies.