I have found the culprit! I had a function named "ground_cover" which was used by an "ent_create" command. Somehow by renaming the function "gc" it works. Can anyone explain this?

Now it's crashing when I try to enter the cave levels, but I will figure it out. My problem is, now that I've figured out the crash, I still don't think I've learned anything. "Ground_cover" is not a really long name for a function, right? If I rename all my functions with shorter names, would that make my program more stable?

I'm thinking there must be some strange issue causing this, I don't think I've really solved anything yet.