Love the game! Really engaging. Easy to play. Somewhat addictive. Instead of the standard bubbles, where you shoot the bubble at the same colored bubbles to clear them, here you shoot down Christmas Tree Bulbs, with Christmas Tree Bulbs of the same color.
Hundreds of levels, with each level being one of seven different types of games, with only so many shots/bubbles to Achieve the Goal of each level: Reach The Top, Empty the Level, Avoid the Mistletoe (where the level comes down at you with each shot you take), Free the Gifts, Free the Bombs (before the Bombs count down and explode), Free the Wreath, and Get Rid of the Bosses. Each level gets harder as you go higher, but not so hard it is unplayable.
The best part for me: no timers, so you can start and stop at your leisure (even offline).
Only downside: while it appears to have hundreds of levels, you can only go so high (level 150 for me), before it locks up and won't let you play anymore (again, even though there are more levels listed).
To previous commenter: once you achieve the goal for each, you can tap the bubbles to keep them bouncing off the bonus bouncers at the bottom of the screen, getting more points for the level.
All in all, a cool game!