Resouerce Chest is an additional reward that you will get for completing levels.

When you complete a level, all remaining time and leftover resources fill up the chest bar.
  • 2 Resources of any type count as 1 point;
  • 7 seconds of the remaining time count as 1 point.

When the bar is full, you'll get a reward! The rewards may include Coins, Lives, Boosters and Infinite Lives.