I played through your whole game. It was an interesting story and I enjoyed the small puzzles you made. I'm a bit disappointed that there was only one battle though after going through so much dialogue. Some feedback:
- Few graphical bugs like layering on the school desk and the monster being visible on the top left corner of the rotation puzzle
- There's a tile collision bug on the rocks. It allows me to walk on tiles that should be blocked.
- I like the foreshadowing of Leo during the class session. It reminds me of how Persona does this during the classroom cutscenes
- On the rotation puzzle, I think it would be nice if you made a square outline cursor to hover over the pieces because it's somewhat hard to see when the character is directly on top
- The first battle was difficult for a first battle. If you didn't make the right choices quickly, you could have easily died
- I think Lucretia's remarks about Marion's crossdressing comes off a little offensive. It makes her look like a rude person asking that to a total stranger. Without any relevance to the plot, it seems like it was thrown in there as a bad joke
Overall, good job on your game! Since this is only chapter 1, I hope you continue to work on this and further develop the story!