I really adore the game up until now! It really is nice to see more cute horror types of rpg maker games, I always look for more of them!
As for what I think... I would say that perhaps the backstory of MC might be too on the nose, as in telling about the imaginary friends. I might be completely mistaken, and it has way more in it, however, personally it would be more fun to let the player find the story themselves perhaps. A bit of mystery to make the player curious is always good! However it's just a suggestion, I still do love it.
The second puzzle wasn't very clear at first, as it was dispersed into two rooms instead of one, so took a bit trial and error.
About the rose room, there are some invisible walls at the upper left, I believe the second and third row at the left. Not sure if only happened to me, but just in case I'm sharing what I experienced.
For last... I guess the gameplay is too linear? I tried doing different things or even tried to upset characters, however, nothing happened that could punish me for it. At the horror parts it would be great to have some punishment, a game over, if something is done wrong, is what I'm trying to say?
Aside of that, I love the MC and how her real self and dream self have differences in design. I look forward for updates or other future works!