Hayday doesn't work after update ipod ios9, how can i fix this?

After the update to IOS9, i can't acces HayDay anymore.
Hayday has been installed on my ipod.
I played it a lot and i hate it that it doesn't work anymore.

After the update:
Hayday is very slow and it shuts down every 10 seconds.
When i acces the game again it turns down after a couple of seconds.

Has anyone the same problem?
How can i fix it?

Please help me or fix the bug in the game or system!