Firetrack

The player controls a fighter ship which flies at constant speed and heading over a series of worlds. The player is faced with both airborne enemies (who approach in different attack formations) and ground-based enemies. Destruction of a whole attack wave results in bonus points, and destruction of specific ground targets (such as buildings marked with X) results in bonus points (and an occasional extra life) at the end of each level. Some enemies are indestructible and must be avoided. There are no power-ups, although the rate of fire increases with more challenging levels.