The player begins with four lives (shown as "x3" in the upper left), and is instantly killed upon contact with an enemy or projectile. Losing every life (when the counter changes from "x0" to "x-1") results in a Game Over. In each level, a timer bar counts down at the top of the screen while waves of [[#Enemies|enemies]] appear from the edges of the screen and move towards the player. Enemies stop spawning when the timer bar has counted down completely, and the level is completed when all enemies are defeated, allowing progress to the next area. | The player begins with four lives (shown as "x3" in the upper left), and is instantly killed upon contact with an enemy or projectile. Losing every life (when the counter changes from "x0" to "x-1") results in a Game Over. In each level, a timer bar counts down at the top of the screen while waves of [[#Enemies|enemies]] appear from the edges of the screen and move towards the player. Enemies stop spawning when the timer bar has counted down completely, and the level is completed when all enemies are defeated, allowing progress to the next area. |