So I obtained all four queen gems, but when I try to slot the final one for the door, I get the "It seems a gem can be placed here" message. I think one of the chests didn't actually add one of them to my inventory.
I went the berry route for the Wallywix fight, and now I'm stuck. After the part of the fight where she offers a bribe, the game crashes. The message i get is "TypeError _0x313d39 is undefined".