Woaw, a very unique entry for the Sega Mega Drive!
The mood is wonderful in this game, and I really love the music and the graphics. It's interested the graphics were AI generated, I don't think many homebrewer have used AI generated content yet! :). The monster look really good, and the whole game have a spooky mood that I loved.
Gameplay-wise, as others have noted I really enjoyed the map, it was very helpful to avoid getting lost. The difficulty is brutal though - I know it's part of the genre's DNA, but this can be a bit frustrating when you discover the game. Oh and I noticed a small typo on the word "inventory" when displaying its content during the game.
That being said, overall it's a very good game, congrats!