Played the demo, here my review:
STORY & PROGRESS
- Adding a story could be a good idea, like at the start, I seen there are some texts, etc, later on, but they were bit criptic, and didn't felt like actual story.Might be a issue on my end, but - I got stuck at certain points, felt like if there was kinda pointer or hint it would be really good.
GAMEPLAY
-The whole gameplay around light and shadow is interesting.
-The door opening mechanic happening with movement keys were kinda fun concept, but they not staying open is kinda tedious, because you might need to open them multiple times in certain parts.
VISUAL PARTS
- Visually the game looks pretty cool, and has some artistic style going on.
OVERALL
Overall it felt like kinda mysterious, and interesting experience, if it's not against the vision of the game, then if some pointers or hints add it could be even better experience in my opinion, but eitherway it's good game, I can see some future with it, good luck.