Dragon Saber (World, DO2)

Dragon Saber is a less known sequel of Dragon Spirit. Gameplay-wise, little has changed from the original, as both games are vertically-scrolling shoot 'em ups putting you in control of a dragon. You are flying over built-up land, complete with rivers and their banks. The enemies and waves can be shot or avoided - shooting them reveals extra points as well as the occasional power-up. Ground units are shooting at you but can't be shot back, so be careful which parts of the screen you occupy at which times.