Scripting Error

[Steve]

just taking a fast look I found the errors I think.
you have three entitiies in one calback: SetEntityActive("cave_in_1", "cave_in_2", "cave_in_3", true);
make it like this:
SetEntityActive("cave_in_1", true);
SetEntityActive("cave_in_2", true);
SetEntityActive("cave_in_3", true);
 
furthermore:
you have an ";" after your if statement delete it: if(level_state == 1) (like this)