Hi,
I have access to Windows now. Your core game-mechanics are well executed.
I see 3 things that would increase the quality of your project immensely though.
1) There is currently no highscore. You don't need to give the user permanent scores, just add a score counter to the top that gradually counts up. That alone would keep the player more engaged I think.
2) Either disable the fullscreen mode ( eg by setting the window type to 'borderless window' ) or scale your game with window size, so fullscreen works better (that's probably a lot harder to do).
3) Increase your font's resolution. Usually you can set the font size in the font component/node. I think you just scaled up the entire font object, which causes the font to become blurry.
Good project for a start!
Best regards,
Sven Hollesen