Welcome to Bubble Struggle
the best flash game :)

GENERAL INFO

Q: I would like to pause the game - is it possible?
A: Yes. However you may do so only during the 'Get ready' screen at the beginning of every level by pressing 'P'.

Q: I would like to get all the level codes for all of the levels!
A: You can get all of the level codes for single and two player mode in the forums. [LINK]

You can find more of basic things on this page: how to play.

GAME STRATEGY

There are two general ways one can approach the game. The game can either be played for speed and overall enjoyment, whereby 'combos' are usually attempted whenever possible, or, alternatively, the player may try to amass the greatest number of points possible. This latter strategy ideally involves as few combos as possible and only on the smallest bubbles if at all. The lack of combos means the player has to destroy the bubbles quite rapidly in order to avoid the time running out on any given level, especially the latter ones. This strategy usually involves systematic popping of the bubbles, whereby the smallest ones are destroyed first (and, in the case of the final level, moving bubbles are attacked before an attempt is made to split stationary ones).

The maximum possible score has been calculated to be just over 1.4 million points and can be achieved by popping every single bubble in all the levels (i.e. no 'combos') and getting extra lives throughout the course of the game. Next, the player would have to pop every bubble on level 22 except for the last 'Size 1' bubble, killing himself/herself every time and then finally winning on the last life. Using this method to complete the game is very time-consuming and can take well over 2 hours, not to mention that it is extremely difficult.

This text is edited and borrowed from wikipedia: http://en.wikipedia.org/wiki/Bubble_Struggle

And for more tips look in Bubble Struggle game forums

Enjoy playing! :)