Here are some tips!

1. Close all apps running in the background to free up your RAM 

2. Adjust AstroKings settings to low graphics preset and turn off other options 

3. Restart your AstroKings (Device Settngs > Apps > AstroKings > Force Stop > Clear Cache)

4. Check your internet connection (Wi-fi or mobile)

5. Delete your messages (in-game mailbox)