A very cute game! Having infinite jumps is pretty fun and the theme implementation is good! I wish there was a way to see your score and maybe some music, but overall it's pretty fun!
I agree that some music would have only made the game better, yet I don't know how to make music or where to get it.
You can find nice free music here on itch (browse for game assets with the music tag), that's what I always do!
Thanks !