Problem

My friend has the game and it looked like a great game so I downloaded it. When I click on the game it shows me the loading screen and then takes me back to my iPods home screen. I have an iPod 4th gen and am using iOS 6.1.6. It looks like a great game and I would really appreciate it if you could fix the problem.

Jejsjha about OTTTD: Over The Top Tower Defense, v1.25