Great job for your first project!
I have a couple of "easy wins" for you, for your next game jam:
1. Put the controls on the screen. Even just a very small "Space Bar - Interact" goes a long way.
2. If you have music that will repeat over different scenes, its best to make it continue playing and not starting the loop again, becuase obviously the loop can be quite jarring.
3. Find a font to use! This is probably the easiest and biggest change you can make, it instantly makes a game go from looking like a "prototype" to a real game, especially when dialogue is the focus.
Overall though great work! Your first game is locked in and you will always remember it as you first project. :D