The title is a quote from "Hamlet" upon which the episodes main story arc is based.
The object/animal/person in this episode is Pleasure Island's ferris wheel.
The coin that David has from his father is a Japanese 5 yen coin. Telltale markings include the golden brass color, hole in the middle, and the wheat grains on the reverse, much like an old penny.
When Robert goes to see Rumplestiltskin, there is a Golden Fleece behind him. That is arguably from the Greek Myth of Jason and the Golden Fleece.
Luke Roessler, who plays young David and young James, also plays one of Smee's children in the Disney Channel Original Movie Descendants 3