My wifi is on but it says there is no internet connection on the game city craft

[AC Question]

Why is my game not working

 

[Rukbat]

There are two connections, your phone to your router, and your router to the internet. Your phone can connect to your router without connecting through the router to the internet. Start with Troubleshooting Wi-Fi Connection Problems and see if any of those things fixes the problem.

If not, create a free account on Android Central here and post again in this same thread and we can go further. (This is assuming that other devices on your router connect to the internet and that you can connect using mobile data. If you can't connect with mobile data, the phone or the app may have a problem.)