First of all congrats on submitting your music to the jam! I know how nerve wracking it can be to show such personal work to other strangers on the internet. For this soundtrack being your first finished tracks it's really really good. You obviously have a sense for orchestration, there's a lot of musical ideas that really gel together and make those songs a very enjoyable listening experience. As mentioned in other comments, there are some technical aspects to be aware of like balance and playing with the dynamics, but that comes with just doing and doing and doing and- you get my point :D Baby steps. (also I can recommend Marc Jovani's yt channel @cinematiccomposing, there's a ton of useful videos to learn from)
I really hope you keep creating because you have something special going on here, I'll be hoping to see you in the next jam!
PS Please give the kitty some skritches from me :)