There are several types of resources in the game:

Energy — a resource that allows you to start levels.

Energy restores every few minutes — the recovery timer is displayed at the bottom of the screen. You can also restore energy for free by watching ads or by purchasing it in the in-game store.

Please note: if you leave a level without completing it, the energy spent will not be returned.

Currency — the main currency of the game.

Currency can be earned by completing levels or purchased in the store.

Bucks are needed to purchase restaurant upgrades.

Experience Stars are given for upgrading restaurants. Each upgrade grants 5 stars.

Yellow Stars are given for each restaurant upgrade. These stars are required to unlock the next restaurant.