Mobile game and advertising are evolving rapidly and becoming the key of mobile contents market. More powerful mobile devices have enabled the creation of better and richer mobile games and advertising. This paper proposes a framework, called Ubitem, which addresses many of the issues that are characteristic of mobile gaming and advertising. Ubitem facilitates time and location-sensitive, interactive marketing by enabling users with the location-aware technology capability to collect nearby items such as m-coupons and redeem the items in the close participating stores. We believe that mobile advertising within location-based gaming will most likely enable much richer entertaining experiences as well as the advertisers get superior responses from the users by linking a virtual game play and real-life action.