This game features mild violence. All enemies are non-human and disappear in explosions when defeated. The player’s submarines also disappear when their health bar is depleted, meaning that violence is implied but not actually shown against the human characters who are presumed to be inside. There are no blood effects, visible injuries, or audible expressions of pain. Gameplay can become frantic.

The game’s first boss has a macabre and disturbing design that may be scary to younger children.