You don't know Iron Lung? Woah.
The movie is based on a horror game with the same name actually, and the game is all about navigating a submarine in a deep underwater (or actually, blood filled) cave. The submarine doesn't have any windows, only a camera that can take one picture every 30 seconds or so, and after some time you see proof on one of the pictures that you're not alone and you have to be very careful with the navigation. The core idea of using very janky controls to navigate a submarine while being able only to see snapshots of the environment and not real time view is pretty much the same in your game as it is in Iron Lung. Definitely check it out! Kinda creepy how close you got to the idea of Iron Lung without knowing anything about it.