i had this same problem when i played through it the first time, it would stall after i froze the stuff glottis spews. i when i started the game over, uninstalled and reinstalled, it worked fine. unless you can find a save from someone (which will be pretty easy, but i dont have any) i would try reinstalling it.
Welcome to, The losfulbinftpsdu™.
…../|,-‘`¯¯`\(o)_\,----,,,_……… LUEshi is not pleased.
…( `\(o),,_/` ¯ : o : : : o `-, …