maybe this is one of your first games that you have ever made so here is some advices :

you have to tell the player what he should do, when I played the game I was just jumping and trying to kill them but It didn't work so well .

second you always need to look for bugs, and let other people try it so that you know if the player knows actually how to play

you will get better by time so don't worry you did better than a lot of other people in the jam

and I hope you check my game :3 https://itch.io/jam/cgj/rate/477007

The game reminds me the things I've done long time ago when I was using scratch, I am sure you have a lot of potential. I could not understand the connection to the theme and it's hard to understand what is happening in the game and there are also few annoying bugs. but as I am trying to try almost every single game here, I must say that there are many games that are much worst than this, keep making games, and I am sure one day you'd be a great developer