Use your mouse
Just imagine: You are so filthy rich that you have already lost all joy of swimming through your extreme amounts of gold. So what else to do with your money Well, why not hide it all over your villa, buy yourself and your family floating suits and then try to get it all back together by solving clever puzzles. Eureka, now even buying those portals and the spike traps seems like a good investment. Ah, being rich is hard.