Don't rely on sound for puzzles. It's an okay mechanic, but it heavily gatekeeps people who don't use sounds, especially since you have an option to mute sounds in your game.
Also, how many endings are there?
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Yup, I know. I would have liked to add an accessibility feature but time was limited (it is a gamejam game!) Also I think a puzzle where you gradually rely only on one sense where originally there were two is interesting, and for accessibility the only real option would be to skip the blind parts altogether.
There is just the one ending!