This game is an unusual remake of arkanoid game. Your goal is to destroy alien turrets to complete each level. You don't need to always deflect the plasma sphere, but you really need to evade the alien shells and missiles to survive.
SevenCrystal evolved from classic brick breakout games with a simple game story. In order to getting seven ancient magic crystals, you must breakout all barriers and set fire to all five torchs to lighten your world.