I really liked the concept and the atmosphere! The story was very touching and sad at moments. But, the dialogue often ruined the mood for me, especially the childish insults and arguments between Dr. Charon and Hades. It's possible for a story to mix humor with seriousness, but it requires more subtlety and care.
If you plan to keep working on the game, I think the biggest area to focus on is accessibility. Like other people reported, neither the browser version nor the Windows version worked with NVDA, so many blind players would not be able to enjoy the game. I did not get a chance to test with JAWS, and I did not test the ping feature, so I can't comment on those.
The second thing I'd work on is adding more complexity and variety to the quests. Right now they all feel the same, everything is waiting for you in the garden every time, and you don't even need to remember or think about which ingredients to use. Maybe you need to go to the forest to find some ingredients, or solve a puzzle or trade with someone to learn a recipe, or experiment to find the right combination of ingredients, or have Cooking Mama-style minigames for brewing the potions.
This game concept has a lot of potential, and with some more work it could be a really interesting and heartfelt game!