oh i misunderstood, you were actually completely stuck after removing, and inserting the fuse? oh man - i am sorry. very little changed from build 2>3, build was done in a rush and i didnt test it :S
im amazed you actually managed to get to press something in the elevator even :P
i must remedy this immedeatly!
just to confirm, the WebGL is playable (though has no trigger for the ending :P)
i shall debug and fix the mentioned issues and upload build 4 today :D
thank you again for making me aware of this!