Oh thank god it worked! Also, I seemed to spawn the item recently somehow, by quitting the game and reloading my save file after killing the gorilla, but I didn't know what was happening or if others would be able to do this trick.
Also, glad to hear you liked the game :) as for a sequel, I'm probably not gonna do one and instead (if I ever get access to Game Maker studio again) just expand the original (I wanted to make a final area for the final boss fight).