the third riddle is bullshit, it was phrased like it could be a tricky question, so i answered it like it was a tricky question. it really asks for two DIFFERENT COLORED gems.
BOSS SPOILER: He does a first pass which won't hurt you if he touches you, he only steals your fairyflies if he touches you with his mouth open. When he passes with his mouth closed, that's the place where it's safe to go. He never takes the same path twice.
great game, took me a good 20 minutes to beat. it's a good kind of hard though, not the kind of hard that makes me want to smash my keyboard, the kind of hard that taunts me to beat it