Unfortunately I don't think any of the visuals (sprites, backgrounds, CGs) have alt text, nor do the selectable controls (like text auto-forward or skip) change their text based on status.
Gotcha, well at least it's good to know... :)
Maybe something to consider at least for vital visuals in the future, though I know you've got allot on your plate already. If you need any help or testing, try the audiogames.net forums, r/blind on reddit, or this discord server: https://discord.gg/c3rGEQFNs