Marxy 37 wrote a pretty exhaustive feedback ! But I can add some minor points :
- if you go to the left when starting the game you're stuck.
- I have a 16/10 monitor, and I see the game on top/bottom off cutscenes.
It's really impressive for a first game. I like the aesthetics and the narration. There is some adjustment to get more challenge perhaps. Add some text during cutscene to help understand what's going on.
And you MUST add at least one Music and one sound for each action the player does. I usually use freesound/opengameart for sfx, and incompetech for music, this can be done in 1h.
But once again, really good start, great job, keep it up !