Airlock

Airlock is a 1982 Atari 2600 action, arcade, and platform game developed and published by Data Age.

Trapped in a crashed nuclear submarine, you must climb through its levels before they flood. Each floor contains two hatch keys needed to unlock the elevator to the next level. Loose torpedoes move across the floors as the submarine shakes, so jump over them to avoid being stunned and losing valuable time.