TL;DR – A film that is all-vibe, but it leans into that vibe with a gusto you rarely see.
Post-Credit Scene – There is no post-credit scene.
Disclosure – I paid to watch this film.

Iron Lung Review Introduction –
Today, we are diving [pun intended] into some fascinating independent cinema: a film made from an Indy video game, and then independently financed by a YouTube star in their directorial debut. That is such a fascinating combination that I had to take a look.
So, to set the scene, sometime in the future, a calamity has occurred where every inhabited planetary system disappeared in a catastrophe called the Quiet Rapture. Only those living on artificial structures survived, and there are not many humans left. Humanity is heading fast into extinction when a random moon AT-5 is found covered in an ocean of blood. Using convicts, they explore this ocean for answers. One of those “volunteer” pilots is Simon (Mark ‘Markiplier’ Fischbach), a man with a lot of blood on his hands. He is welded into a submersible called SM-13 and sent to the bottom of the ocean to explore, only to find there might be horrors in an ocean of blood.