Seaport Guarl

The player controls a tank on a dock, and has to shoot at three cannons on a large ship; the ship cannons constantly shoot back at the tank. Later stages feature larger ships with more cannons.

The game's title is presumably a misspelling of "Seaport Guard". Bizarrely, the "L" on the game's title logo appears to actually be a "D" with its top-right corner missing; making it unclear how the typo even occurred.