Thanks for the response and sorry it took me so long to reply.
All recent renpy games do have TTS and the provision for alt text built in, but keyboard nav, actually adding alt text, not using visual only puzzles, text alternatives for vital visual indicators ETC, that's all up to the dev. So that's why it's nice to know in the description what you've done specifically. :)
Seems like your kicking ass at the blind accessibility based on what you've said though, so thank you very much!