Dear sir!
My best skills are Game Development, Cocos2dx, Cocos2d, Unity3D, iPhone, Android.
Until now I developed many mobile games for both Android and iPhone for clients.
I had developed Flappy Bird style mobile games, I can assure I am confident in developing Flappybird mobile game.
If you entrust your project to me then I will finish your project wonderfully.
I will wait your reply.
Best, kangapp.