Bullet Bill 3 is a fast-paced side-scrolling game in which you guide a bullet through Super Mario levels. Smash blocks and enemies from the Mario universe as you control the bullet with your mouse. Keep the bullet away from indestructible objects and weapons. You have the ability to slow down time, which can be activated by clicking when the meter around the stopwatch at the top of the screen is full. Unlock new characters by picking up keys that are in some levels and avoiding the flying mask that chases you.