I'm not as familiar with solo-journaling TTRPGs, but have played a good number of indie TTRPGs, so take any feedback here with that in mind.
As others have mentioned, I don't know that there is quite enough here to really constitute a game. For me, having more thematic elements, more detailed prompts, and (probably most importantly for me) having some kind of card-draw / dice-roll / rules would have been really valuable.
I think, if there was any concern that those tools wouldn't be accessible, you could always point to online tools to do that (like https://www.random.org/playing-cards/ or https://www.random.org/dice/).
You mention on the page description that "the JPG version has fancier & more aesthetic formatting" - I think, given the nature of the jam, it would have been valuable to port that, either describing the nature of that content in the PDF, or replicating the space / star-like scenery in the audio recording (with sound-effects / ambiance).
Perhaps you could even use accessible fonts and high contrast lettering to make sure that the content is as-readable-as-possible for those with some amounts of low vision!
The solo-journaling scene feels (at least to me) relatively young and certainly niche, so I would hate for this to turn off would-be enthusiast of the genre. I think there's probably a space for it in this kind of jam, but needs a bit more development, and some clear affordances for a visually impaired audience, and that needs to be the primary offering for that experience, rather than a substitute.
I sincerely hope this doesn't come across as mean-spirited, and hope you continue to participate in these jams - this is my second year participating, and I learned so so much from the feedback that I received in the first one. I do hope that you and others take this feedback, learn, and help teach others how to build accessible-first experiences!