So first thing I will say is that, for your very first game and jam, this is actually way better than you're giving yourself credit for, and far from being ashamed, I think you can hold your head up high knowing that you made a really awesome project in the limited window you were given. I had a lot of fun with this game. It felt exciting fleeing from the monsters, trying to round them up to attack each other. I like the wide range of different creature types you had and the art style is really enjoyable, with neat effects and I'm impressed how you managed to get each character to have their own unique behavior and attacks.
I think you have a solid base for building a great game and I encourage you to keep at it. Best of luck to you.