Tap the obstacles carefully so that balls coming from random directions can pass through and touch The Nucleus.You'll have to start again if the ball touches the obstacle.
Remember that on touching the obstacle, it will turnoff for 4 seconds only.
After some while level will keep on increasing and so does the speed of the balls.
You'll get 1 Gem at each level and 2 Gems on breaking your own high score. Keep collecting your gems and try different ball sprites (e.g. Fidget Spinners, starts, English alphabets etc) in the store.
Don't Forget to share screenshots of your high scores with friends and challenge them.