Gravity affects bubble movement when you pop them. I found that burst bubbles cause others to fall down.
Click the mouse to aim, and shoot bubbles at groups of the same color.
Controls are not stated, but you can see points increase after each burst.
Quick is the way to think about aiming. I discovered that you should aim for large clusters to get more points then smaller ones.
Q: How do you play the game?
A: Click to aim and shoot bubbles at groups of the same color.
Q: What is the main objective?
A: Burst two or more same colored bubbles to watch the cascade happen.
Q: Are any extra features stated?
A: Points are shown and coins can be collected for new features.
Q: What is the main mechanic?
A: Gravity causes bubbles below to fall when you burst bubbles.