The environment and ability to immerse the player are really good. Gameplay is simple, and it could be definitely extended fully into a complete experience.
I think more attention should be put into some of the smaller artistic details to make it more consistent. The Purple box UI does not mesh well with the character art -- it would be probably better if there was some paper texture/fuzzy borders etc. to fit the art style
The pixels are unaligned periodically. Is there a way to fix this?
And most of all, the cutscene art is a little cringey and needs a lot of polish. It probably would be OK to use one fleshed out image and just a lot of text rather than needing to animate individual frames (sort of like Danganronpa cutscenes)