1. Settings: Set Launch as Manage manually.

Steps: Settings -> Battery -> Launch -> Army Men Strike( Manage automatically -> Manage manually)

Manage manually: Check the following

Auto-lanuch (Launch on startup or in background)

Secondary launch (Can be launched by other apps)

Run in background (Keep app running in background)

 

2. Keep WLAN on during sleep

Setttings -> Wireless & networks -> WLAN -> Configure -> Keep WLAN on during sleep (Check Always)