The only hard levels were probably the last two or three. For most of the game the amount needed to earn only goes up by $10.So when you reach the halfway point of the game, you're earning practically 3 times as much as you need and have gotten all the upgrades, making the game play repetitive and boring.
Reviews for "Penguin Diner 2"
I only keep earning 54? for the first level? ummm.... not fair? I think I'm missing a level? I'm not earning enough even thought im pretty quick with the customers....