The game Bubble Shooter 2 probably got this famous as it is very intuitive and easy to learn.
Thats probably why it's so easy to get into the game. Some notes on the rules and how to control the game.
The aim of Bubble Shooter 2 is to collect as many points as possible. To get points you need to destroy the colored bubbles. In order to burst those bubbles you need to row,connect at least three bubbles of the same color.
In the bottom center of the gaming window you will find an arrow. Every time you click the left mouse button you will fire a new bubble to the current direction of the arrow.

HOW TO PLAY:
- Tap on the game board where you specifically want the bubble.
- Match 3 or more bubbles to knock them out.
- Clear all the bubbles on the screen to level up.