Thanks for playing it! Glad to see that you felt like on a B-movie. That was what we were striving for!
The locks can all be broken by the slasher on a random basis. When the enemy tries to open the door to chase you, it has a chance to break the lock, but it doesn’t try more than once. If the slasher can’t break the door, it tries to find some other path to get to you, and if there is none or you get too far, it teleports to one of the fixed places on the mansion.
We know that this teleport could sometimes look weird, like it just appearing somewhere you know it couldn’t be, but it led to some really awesome B-movie moments when you think you’re safe and when you open the door the slasher is there. Kind of a Nightmare on Elm-Street feeling.
And also all the locks have the same strength, what changes is that as you get more keys, the slasher has a bigger chance of breaking down the locks up to the last one where it can always break down the doors to chase you.