Thoughts on the money search: As currently implemented, not very fun. At times the placement makes sense, such as in a vending machine's return slot - but most of the time, the coinage encourages mindless clicking.
My suggestion on the matter: Condense the coins into four or five areas per screen, and add a riddle system. EG: "A rounded box that contains a golden treasure." (egg), or "Pop goes the weasel!" (icecream truck), and so on.