You have to suck up all of the objects ahead of you so that the ball doesn’t touch anything.
The first levels will be simple, but as the number of obstacles grows larger and larger, the game will get more and more difficult.
If it touches anything, the ball will fall apart and you’ll have to start the level again. Since the levels are generated automatically, their number is infinite.
You can play the game for a long time before it starts to bore you.