Nice game, I believe this is your first jam. Some background music and sound effect would have been nice :). Trust me, it makes it more playable and fun. My first jam submission also didn't had music (I submitted it from different account for Wowie game jam) https://itch.io/jam/wowie-jam-4/rate/1663490.
I learned my lesson, and from next jam onwards, I added music and sfx. There are plenty of free websites which you can use for music and sfx :)
Anyways main purpose of joining a jam, should be learn and fun.