The vertical scale appearing at the right side of the screen indicates the bonuses. By collecting coins, food and collections’ elements you can receive additional coins and energy units. The more bonuses you collect without a break, the bigger gift you can receive.  

 

The value of the prize depends on your level (you will see the special multiplier) and is a multiple of 2, 3, 5, 10, 15 and 20 with the indicator growth. In addition if you reach the middle and the top of the scale you can receive 1 and 3 energy points respectively.