The Mortuary Assistant is far and above an excellent game, considering it was made by one person. The game's randomized jump scares are really fun, considering how it plays with the player the further along the night goes. That being said, it's short. The game's narrative relying on multiple "shifts" that change up based on some clues you can find that progress the main character's story. It's just a really short experience, and if you get repeat endings it shows how little content, even though it's really good content, the game actually offers.
I don't know if they plan to update it with more variant endings, demon mechanics or if this is just what you get on the tin, but for what it's worth, I recommend it if you're looking to have a spooky time and can spend the cash.