The majority of upgrade after the first restaurant require a large amount of gems and the game doesn't give any at all. I get 6 gems from leveling up and the upgrades need 7 to 10 gems just to upgrade to the next level. The reason why everyone loves the first restaurant is because you could actually progress without the need of a large amount of gems at all. As soon as you get to another restaurant, the game becomes a money sink. Ridiculous absolutely Ridiculous