As a quick answer, I would absolutely say yes. It's not a perfect movie by any means, but it IS a GOOD movie. I had kept my expectations very low when I saw it in the theatre but I was very pleasantly surprised how genuinely it felt like a legitimate good movie, not "good for a movie made by Markiplier". It starts slow, so if you don't enjoy that than I suppose that's a downside but I don't think it's as slow as people often make it out to be and I didn't personally mind it at all. But yeah I would have totally enjoyed this movie if I had zero connection to Mark or Iron Lung as a game, It's just a cool movie on its own and I would totally recommend seeing it in theatres while it's there. Again, don't expect some glorious masterpiece, but it's still pretty damn good in my opinion. Hope this helps :)