Have you ever wondered why the Princess is so rich? It is not inherited wealth, favourable taxation or suspiciously creative royal accounting. Well, not entirely. Her true secret is a proven business model: from time to time, she clambers down into the nearby chasm—in a suspiciously Pac-Man-like fashion—and collects every gold bar, precious gem and priceless statue of herself she can find. Every last one. The Princess does not believe in the vulgar little concept known as “enough.”
Fortunately for you, the Princess is remarkably robust, as princesses tend to be whenever the plot requires it, and can survive falls from frankly unreasonable heights. Unless, of course, she lands on a cat—or one of the chasm's other disagreeable pets. Gravity can be negotiated with. Cats cannot. In this game, they have simply stopped pretending to be friendly.
To remove any lingering uncertainty: the game is completed only when every last gem, gold bar and royal objet d'art is safely tucked into her pocketsess. Leaving so much as one shiny trinket behind would be fiscally irresponsible—and, more importantly, completely out of character.