The Stage Light in the upper left corner of the screen with the “H” icon shows Dynamite Headdy’s vitality. The light starts out green, but as you suffer damage, it turns yellow, then red, and begins to blink. The “H” icon inside the light will also become smaller as you receive damage. If the light goes out, you will lose one try. When it’s time to battle the Key Master, the same kind of Stage Light with an “E” icon will appear in the upper right corner of the screen.