You can't put the game in full screen and press ESC to exit the menu afterwards (this removes the full screen).
Can't we download the game directly rather than playing in a browser btw?
I'll look into that later and make the necessary fixes. For now, this game is just a small, casual experience that you can enjoy in a quick 5-minute session. I don’t think it’s worth keeping such a short game on your computer. However, if there are updates and the package grows with more content to explore, I’ll upload it as a downloadable game.