I have about 3 years of experience in 2d game development and I think I'll be more than capable to build the game you. I need about 15 days to build the complete game. I downloaded and had a go at the game and I felt that the controls could have been a little better. Anyway I'll be jotting down more points and discuss what more can be added and made better. As for the other features like leaderboard, ad service etc. can be discussed later. Let me know if you're interested to collaborate.