Hey there! It's a good start for someone who forgot they participated to the jam :P
Just two simple QOL improvement:
-In itch you could set up the viewport to something larger than your actual game, often you have option in your game engine to stretch the embeded games.
- You should choose another key to get back to the main menu. When you're in fullscreen mode ESC is gonna quit fullscreen. You could just put ENTER as you had in the title screen.