It would not turn back on

My phone remained on the reboot screen and heats up... i downloaded a game called 'Dear Red' . i left the phone on the desk with 56% and it was rebooting. it repeatedly show the reboot screen. The phone had problems charging so i place the battery into the other phone( samsung galaxy 2 plus GT-100) to charge my battery...{it may seem dumb but thats the only way i can charge it}...Now the two phones will not switch on. The phone turn on for a moment just a few minutes and turn back into the reboot screen again...

Can anyone help me?