It's fun and nice but there's always room for improvement. For instance a little particle and sound effect when you lose makes the jank to restarting the game feel smoother. That way it'd feel less like "Oh, guess I lost" and more like "I lost. Time to get back on the game".
Also until you get better at composing just use some royalty-free track from the Internet. The background music is... not pleasant.
But hey, it's still a fun and compact game and that's what matters in the end.