firstly, congratulations :D good job on finishing the game, and submitting it on time to the jam :) The only feedback I can think of right now is that it would be nice if Gary stayed in place, so for example if I clicked and dragged him somewhere, when I let go he would stay in place, and then potentially start moving again when I click him. However, I am also new to Unity :)
The assets worked well together, and the music was nice. It definitely fit the jam theme, and yeah :) in a way, I feel proud that you have made this game considering that you are only 13, when I was 13 I wouldn't have any clue on how to make a game, so good job :) Keep developing games and learning, you have a bright future ahead of you :D