Great game! I thoroughly enjoyed exploring your game.However, I did get stuck right before the tree section. With your hint I figured out the necklace vacuum thing, but I couldn't seem to find any way to actually get it. After an hour or so of being stuck looking for the necklace, I dug through the code and saw that the necklace drops when the vacuum exits the grapple state, but as far as I could tell this never happens without a game over. I changed it to drop when it's killed instead, which let me play the rest of the game.