Mobile development

I need an Android app. I would like it designed and built. I want a game very similar to flappy birds. The requirements: 1) game should be on the same style as flappy bird 2)I want there to be 3 different levels. One normal whether, one raining and one stormy desert whether 3) each level should have 10 sub levels. 4) the first levels have to be completed to unlock the next. 5) there should be no music in the game. However natural sounds are OK. Like wind, raining sounds 6) there should be no pictures of animate objects 7)I want there to be 7 characters in the game, the first a bike, car, bus, lorry, train, helicopter, aeroplane, 8) the game I want it to be free with in app purchases. So level 2 and 3 will need to be purchased, and the bus, lorry, train, helicopter, aeroplane will need to be in app purchased. 9) there should be no ads 10) the most important is that everything should be copyright free 11) the game is for android