I liked your game a lot! The atmosphere was creepy and the puzzles were challenging! I defenitely feel like I would need to play this multiple times in order to get the other endings and make sense of the story. I made a video of my playthrough. (I only got one ending, took a little longer for me to beat.)
Some areas of improvement. The game's framerate could be improved. It sticks at around 30-40 which kinda bothers me, but at the same time, this is a slow paced point and click adventure, so it's waaaay more forgivable. Also, screen resolutions would be really nice as well as windowed mode. The brightness adjustment doesn't really make a whole lot of sense in the way that it works to me. It seems to just be adding light to the game, but doing that makes some of the details in the assets just fade out. It's a bit hard to describe, but take for when you're at the house. On the default setting the brightness shows the details of the house and windows, but the higher the brightness, those details are gone and are replaced by a bright light. I don't know if this was intended or not but I feel like it could use some improvement. Lastly, clicking on some objects in the menu can be kind of a pain, sometimes it doesn't detect that I clicked on it or other times I have to constantly click the pointer to go back to investigating an item. I feel like this could be streamlined a little better.
Overall though, this is a great game! It was very enjoyable. I hope you can make some improvements and keep up the fantastic work!