Clear the stage by using the bomb to eliminate all enemies and entering the door before the time runs out. If you touch an enemy, get hit by the blast, or fail to clear the stage within the time limit, it counts as a miss and you lose one life. If you run out of lives, it's game over.
(The stage is cleared by using the bomb to eliminate all enemies within the time limit and entering the door. If you touch an enemy, get hit by the blast, or fail to clear the stage within the time limit, it counts as a miss and you lose one life. If you run out of lives, it's game over.)