2d racing game

I require a 2d racing game programming and lunching onto the google playstore. a fun racing game of farm animals racing around a grass track with farm buildings providing the background. The game will have 5 core characters, with the option of purchasing further animals in game. each character will have different attributes and power ups and hazards will exist on the race track. different levels, including training track, championship mode and single player cup run. maybe down the line with an update possibility to link up the game to other players (play against friend) extra tracks etc later with updates. touch screen controls or tilt device.