What game engine did you use? For your first completed game this is really good, much more in depth than what I made my first time. I hope you learned alot and apply it to your next game, I'm looking forward to seeing what you make
The game itself has really good art, music and a nice feel in general. I couldn't open the door in the room with the red box in your screenshot, but was still fun reading all the dialogues. Good job!