Jail fingers of your friends!
Your money, wallet, jewellery, confidential data will be safe now :).
Go into game settings. Set the pin code, the number of fingers and the alarm sound. Lock fingers of your prisoner (ask your buddy for touching the screen). Any attempt to escape the jail will trigger the alarm.
Enjoy!
P.S. Please note that screen protectors can cause problems in touch detection.
P.P.S. This game is made just for fun.