A wagering game system and its operations are described herein. In some embodiments, the operations can include receiving, at a wagering game server, a request from a mobile device to play a wagering game via a selected wagering game machine among a plurality of wagering game machines on the wagering game network. The operations can also include associating the mobile device with the selected wagering game machine, wherein the associating allows receipt of input for the wagering game from the mobile device. The operations can also include receiving, via the wagering game network, commands resulting from inputs accepted by the mobile device. The operations can also include determining a result of the wagering game.