Gameplay - It seems like a reasonable foundation but there's not a lot to do because it's so short. 3
Story - Interesting hook, but unfinished. 3
Presentation - The art style is excellent. 4
Creativity - The dialogue in particular is very fun, and the premise is definitely not something you see everyday. 5
Horror - Most of the horror is atmospheric or implied, unfortunately. 2
Theme - The cursed jewel is literally the main character. 5
Honestly, most of these would almost certainly be higher for the full game but it's such a short demo. It definetly left me looking forward to more, I hope you continue this.