on day 2 there's no crack so you have to find the key for the gun and then shoot wallace. Then he dies and game end screen shows up. IDK why it was not showing up for you.
hahahaha khubh funny game hota. Story pan mast hota. ek number. fakta ekch problem hota ki field of view ekdum kami thevla tu mhanun asa vatta ki camera ni zoom karun bagat aahe.