Exploded asteroids are scored at 100 points each.A CHAIN is initiated when multiple explosions are triggered with one shot. The first explosion is scored normally; the second gives a bonus of X 2, the third a bonus of X 3.
Another way to score bonus points is by collecting star coins, powerups, precious metals that drop when combos and chains are made. Star coins are worth 100 points each. Precious metals are worth more points if you destroy a segment quickly; the max value is 5,000 points. Asteroids destroyed by lightning or missiles are 100 points each.