A new feature have been added to Bubble Witch Saga, it is a “Buy a bubble”-feature. For each try of a level you have the colours of the bubbles in the game at your left side hand. When you click on a bubble, you get one additional bubble to use right then. The bubble is of the colour you chose and then disappear from the left side. So you can buy only one bubble of each colour per game. A bubble like this cost 6 FB coins. IMHO not worth it. If I have to spend small amounts of money in the game, I’d rather buy extra bubbles for 3 FB coins in the end of the level.
Bubble Witch Saga Eternal Isles 16 is out and Eternal Isles 15 can be unlocked with help of your friends. You find level guides, strategies and videos for all Eternal Isles 15 levels, even the dreaded level 10 with the Shadow bubbles, if you look at your upper right hand and hoover over the 15 >> to open up the menu. Then just click on your desired level!
Here is an Album for all Eternal Isles 16 Levels, that shows you the whole Design for each Level.