A wonderful game! Beautiful design, with lots of intriguing details to be found. It was a little rough around the edges (your English is good but you need more practice). The UI was also a little clunky, it was sometimes hard to tell whether or not I could click on something, and having to click the X at the top of the screen to exit out of viewing something didn't really feel right.
My main criticism is the light puzzles. They felt so of out of place. The rest of the game was solved with much more exploration and dynamic solutions, but these were just brain teaser puzzles that you had to do in a linear order in order to advance. I'd suggest something using else to break up that hallway.
The atmosphere was really what made this game, heavy with slowly growing dread and fear despite the light colors and soft music (I loved the music too, by the way.) The face in the mirror was trippy, kinda like being on acid actually.
Overall a very good game. I was very impressed, since in the description you stated that this is your first one.
Also, a tip for people stuck on the light puzzles. Use symmetrical patterns!