Play mini-games, unlock them, complete the task and become the best. The first task is a mini-game where you have to score 10,000 points and open all the planets. The second task is a secret that you will learn after completing the first task. Each task has new mechanics.
The main goal in the game is to score as many points as possible. To do this, you need to click on the screen and hit one ball into the exact same ball below, after which they will combine into a new one, and so on until the very last balls.