HELP with giant spiders and Indiana Jones boulder

[Ashtoreth]

Hi,

I started a new game and I can confirm that it is possible to break the boards before or even after crossing them, with only one hit. I tried it both ways and it worked; the rock fell on the hole.
I was also able to cross the wooden planks with or without running and the rock didn't crush me.

Note that you cannot run when you are crouched (inside the tunnels) but when you cross the boards you can "uncrouch" and run, and then crouch again.

If reinstalling the game does not help, I can provide you my save file.