Tips and Tricks
When at level 16 you'll unlock Oh's capability which lets you select a bubble, and every other bubble of that very same color on the board will right away pop, despite their area.
Whenever there's bubbles close by, you can swipe your finger over them without releasing and the game will certainly include it in your chain, even if you didn't link it your very first time through. Make huge chains by linking everything!
Rainbow bubbles start to appear after level five.
Rainbow bubbles act like wild cards; if you include them in a chain, they will certainly have the ability to match other color beside them.