Excuse me, where is the key to the second manor gate?
I get the key after kill some zombies around the fence of the manor. After kill some of it, a zombie will run to you. Kill it and you get the key to open the gate. Hope this will help you.
May you please teach me how you speed up the with cheat engine exactly ? Like how can I find the value of the timer?
Also is it possible to hack the health and ammo ? I'm really confused because lots of people said that they beat the game by hacking it with cheat engine but I have no idea how to do it.
I finish this game with ease without cheat.
There're so many ammo left when I finish this game, so I think using cheat will be overkill it.
Always aim for the head with full accuracy, you will only need 2 ammo at least for one kill.
And for the locked room you can pass it with ease too. Just have your character get violated with the zombie.
Don't fight it, just enjoy it.

You can pass the timer room with ease.
I think the developer need to make some punishment to make this game more interesting. I hope in the next update.