This was a really pretty game. The music fit well, and the main mechanic was interesting! I also liked how nicely the menus were polished.
I had a little trouble with knowing when the clock would change from day to night, but after a little while I figured out roughly when things would change. It might help to have something like a Minecraft-style clock or some other similar system so that it would be clear at a glance what time it is.
The idea of manipulating time to find treasure really is neat. I liked the idea you went with, and having it affect the enemies was great!
Nice job!