Hello, the game is using the Ren'py engine, which comes with built-in self voicing. https://www.renpy.org/doc/html/self_voicing.html
When in game, press the v key to activate it, or shift + a to open to open the accessibility menu, which also has a self-voicing shortcut. If you've already downloaded the game, can I ask if it functioning as intended?
Regarding image descriptions, they are planned, and will likely be implemented in the next demo version, v.7.05, which is coming out in early 2024.
Thank you for your interest in the game! Gotta support everyone from our fanbase :D