There are three Lever Handles throughout the game. One is required to complete the Primordial Cave, part of the main story quest. But I noticed that these handles, while they cannot be sold, CAN be destroyed.
Is it possible to render the game unwinnable by destroying all three Lever Handles? (or just destroying the one in the Primordial Cave, if they aren't interchangable.)
Also, for that matter, ARE the three handles interchangable?