Zephyr

At the controls of your fighter, the Zephyr, your mission is to defend a human colony established on planet Katerra 560. Patrol the skies above the colony while avoiding all ground obstacles… all except those marked with a large letter “K” — they allow you to refuel with kerosene. From time to time, squadrons of invading ships attack: dodge their fire and fight back by trying to shoot them down. Your fighter moves at a constant speed, but you control left/right direction and altitude using the joystick or the mouse (just like with an aircraft control stick). The goal is to repel the enemy attacks over several levels and save the colony.