This game would be an excellent contender for "highly speedrunable" if its targets randomized between rounds. As it is, only the turrets shoot faster, reducing the skill factor considerably. Game name is based off the "Guns of Navarone" book from the 50s about the Greek island of Navarone in WW2.

Part of the Gotta Run Em All Arcade series - Game #624

Start (Start Pressed) - 00:02

End (Round 6 Appears) - 06:00

Total - 5:58