As someone suffering SEVERELY of arachnophobia, I can't run The Krypt. Knowing that a giant spider can jump up on the screen at any time scares the freaking shit out of me and so makes it impossible for me to unlock a part it. And because of this, I'm actually considering just putting real money into unlocking it all instead.
I don't WANT to. I really don't. I want to unlock and explore and actually PLAY THE GAME! But because of that spider jump scare, I might have to. And it freaking sucks. :/
The Spider Jump only happens in the Spider Kave, in the graveyard it's wolves.
As long as you stay out of the spider cave (And have someone go through that for you), you should have no problem.