If I didn't have integrity I would give you five stars for knowing the difference between caliburn and excalibur alone.
In all seriousness I think you did a great job. Arthurian Legend is a personal favorite of mine, and I appreciate utilizing it in the campaign, along with the way it at first mirrors the start of Tyler's downward spiral, before switching to killing off characters to adjust to their real life counterparts developing obligations that keep them from playing. The (original) art is very charming, I like that Tyler goes from being the dashing king Arthur to a vagabond equally as scrawny and timid seeming as his real life counterpart. The unique sprites are good, I wish maybe they'd been for main characters instead of a couple that we only see for a few lines, but I suppose you already had the dnd equivalents baked in with the premade assets. The unique backgrounds in the sessions are my favorite part. Getting the DnD out of the way, I think you captured the vibe of a tabletop session really well, both in how good banter between players (and DM) looks, and also reminding me that specifically DnD is just not fun as a system, which means you must have portrayed it accurately ;> The presentation is crafty with the Eyes of God and their color changes and how they're represented as the DM's voice vs. that of the Mental Illness, which is where the real meat and potatoes of this story lie.
It always feels counterintuitive to say that depression, at least the kind that revolves heavily around self hatred, is a self obsessed and narcissistic disorder. But I think the writing really captures how well the oxymoronic fallacy of thinking that you should be better (than fate, or other people, or god, etc) and able to control all of this, which is why it's your fault. Sometimes this shit just happens, sometimes the chemicals in our brains don't work right, sometimes we make mistakes (we're only human after all). But in the way depression and self loathing distort the way we view the world, especially if we take a fall after doing so well, it compounds into a self fulfilling prophecy, just as it says. Every thing that goes wrong links directly back to yourself, even if it really doesn't. It's a good representation, it's spot on, and it plays so well with the dynamic of the fantasy world and illusion of control he's trying to maintain, along with the metaphor of choice, the butterfly effect. It's well utilized, and it makes for some really poignant imagery.
Personally, I appreciate the conversation with Tyler and Tristan at the end. The lone wolf/your wolf is cute wordplay, and I think it's endearing that he works so hard to avoid leaving any gaps to fill in with more cognitive distortions (not that he uses those words). SPEAKING OF WORDS I don't know when, where, or why "two people communicating their feelings directly" became "therapy speak" but whatever!!! I think it's well done, and if ever there's time to be telling people directly your feelings and trying to be patient and help them understand, it's a situation like that. Good work, looking forward to your larger project in the future.