The player runs and jumps through the interior of a crippled submarine with only ten seconds to complete each level.

The game's primary objective is to escape the submarine by progressing through its various levels, all while managing time constraints and avoiding obstacles.

The time pressure increases the difficulty, as taking too long will cause the floors to flood, rendering escape impossible and resulting in a loss.

Airlock tests the player's reflexes, decision-making skills, and ability to stay calm under pressure as they race to escape the submarine before it is fully submerged.

[3] In a review long after the game's release, Keita Iida concluded: "Graphics are drab in typical Data Age fashion, and sounds consist of nothing more than blips and beeps.