Navjet

Navjet is a side-scrolling arcade game where you fly an attack aircraft to defend against enemy aircraft and naval force from a neighboring country. You start out in the center of the screen with eight lives, and your jet aircraft in the air over the sea, with the enemy coming from the right side of the screen. Movement up/down/left/right is allowed, so you can fly back to catch enemies who passed you, though you cannot move left of your spawn point.