- Shoot the colored bubbles. Destroy bubbles by forming groups of 3 or more bubbles of the same color.
- Touch the next bubble or the player character to swap the current bubble and the next bubbles.
- Destroy the bubbles on the enemy to attack the enemy.
- If a spaceship is captured, all enemies have to been destroyed first.
- If all enemies are destroyed or a spaceship is rescued, the stage is cleared.
- When failing to destroy bubbles, the value till the attacking of each enemy is counted down.
- If you lose all of your life hearts or a bubble is fixed outside of a play area, the game ends with a game over.
- If you destroy the bubbles under the special item, you can get it.
Your life hearts are replenished by one piece.
Your life hearts are increased by one piece.
Your attack force is increased twofold.
The number of the next bubbles is increased by one piece.