At first I tried playing with my eyes closed an was immediately stuck on the first screen since nothing indicated to press a button to start the game. So I navigated a bit with my eyes open and once in gameplay tried playing with my eyes closed.
The voice lines for the directions from the creatures is a bit too distorted and muddy to make out what they are saying clearly. The main voice lines were a it muddy too. Look up how to use a noise reduction, compressor, eq filtering and normalize for audacity (or whatever program you use) That will elevate the audio to a brand new level!
Due to these issues I thought maybe this game was more meant for visual impairments other than complete blindness so I played squinted to give myself blurry vision. The large text, big characters and large direction indicators are a nice touch for this type of accessibility. The music was also a good choice. The victory sound was a bit loud compared to the rest of the game.
The gameplay itself was fantastic. simon says with timing bundled with a solid motivation/theming is a good start and adding in the twists of additional timings, blocking, and inversing the inputs occasionally made for a fun challenge. Only slight complaint I could give to gameplay is at first the window to respond for your button presses is very short which learning the game makes it feel a bit unfair to get smacked so quickly in the face lol. Also the difficulty spike on the boss having twice the amount of directions to remember on top of all the other gimmicks was a bit of struggle. Possibly increasing the directions slowly as you move towards the big boss could have helped with prepping the user for that.
Those are very minor things, so thanks for sharing this project. Very well done and you should be proud of what you pulled off here!