Start a small park with 4 puzzle games close together, 2 rides, 1 food, 1 bathroom and a gate price of $0. If you set it up so all 4 puzzle are within view of each other, you can do the global price raise/lower for all puzzles when all 4 are active (making 40k a pop) The $0 gate price gets them in fast. Set the prizes value to $10 and a maximum win possibility. That makes them happy, stay longer and play more.
