@KitRamos The lemonade stand is multiplied by 1.07 for each purchased. The newspapers are multiplied by 1.15 and everything below that is 0.01 less. That makes the oil rigs at 1.07, like the lemons.
There also should be a seperate currency for goats. The first to minigames become obsolete quickly, and if the amount of goats counted towards some upgrade, it would balance the minigames better considering the first two have many more goats (and other animals) than others