Heres my project:
https://itch.io/jam/gmtk-2019/rate/461710
I made the music myself using an online program called "Beepbox". I'm not really into sound design or music making, but I have to make some for my games. I also thought the rising sound effects as you press each button made the game a lot more satisfying, but I'd like to hear your opinion. Also as you progress through each level, the music evolves. I tried to make this seamless, but it just restarts the music each level.
Hope you can check it out for yourself!