Game Crash, Phone shutdown

Hi,

I got a problem with PvZ 2 on my Galaxy S4:

I can start the game and its running fluent but after ap. 2 min the Display gets black and i realize that my phone shut itself down all alone. In addition the phone is quite warm/hot after shutdown so i suggest it may shutdown due to overheating but i cant imagine that the processor cant handle the game.

Is there anyone who got the same issues and knows a solution? Or is it just me? I noticed that some people got problems on the loading screen but my problem is ingame...and its a complete phone shutdown/crash, not just the game. Plus, i cant restart the phone directly i have to wait for 2 min because it wont start earlier...

Thanks for help!