Um, they can totally be spoilers. The moment of discovery where you go "oh, you can do THAT? This changes everything!" is the entire point of the game.
spoilers, put it inside double spoilers to make sure people don't accidentally click
Even if you consider this stuff spoilers, you're talking about how puzzles are solved rather than the outcomes. All I was curious about was examples of the "so much to do in this game" based on puzzle solving that wasn't directly opening a path or solving the next puzzle.