If you're having trouble clearing a level, why don't you use the pop-up booster shown in the ready pop-up?

✔️ Bubble ball

When this ball hits the floor, the bubble surrounding it disappears. Therefore, it is a ball item with 2 lives!

✔️ Flame ball

When this ball hits a brick, it removes two lives from the brick.

✔️ Bomb ball

When this ball first hits a brick, it multiplies by two.

(2 balls are added to make a total of 3 balls including the basic ball)

✔️ Ghost

If you use this booster item, all ghost bricks in the level will turn into regular bricks for one round.

✔️ Reward

If you want to add 5 more regular balls, watch the reward ad and see how many balls were added during a round!

🔍 Every booster ball you get is in addition to your regular ball count.
= number of regular balls (+ number of booster balls)
Since the reward item provides regular balls, it is exposed as the final summed number of regular balls.