Likely a bug. I carried the skull item and got this error when trying to dance:

  Uncaught Error: Frame tag not found: dance-carry
    getTaggedFrameIndex Aseprite.ts:140
    update Player.ts:859
    update GameScene.ts:424
    update Scenes.ts:130
    update Scenes.ts:128
    update Game.ts:107
    gameLoop Game.ts:86
  Aseprite.ts:140:18
    getTaggedFrameIndex Aseprite.ts:140
    update Player.ts:859
    update GameScene.ts:424
    update Scenes.ts:130
    forEach self-hosted:216
    update Scenes.ts:128
    update Game.ts:107
    gameLoop Game.ts:86
    gameLoop self-hosted:1171