Launch a ball from the bottom of the screen to destroy orbs with number and reduce their number to zero. You get +1 health (represented as the bar below the screen) for each orb and block you reduce to zero.
The orbs will slowing advance down, if it hits the bottom of the screen, you’ll lose.
Light up other orbs and blocks by hitting then with a light orb. Light orbs will deal damage equal to the number on the light orb. Lit objects cannot be damaged further as long as they are lit.