Impressive for a first game jam. I appreciate you using low-poly style. Since shitty low-poly will always be better than shitty high poly.
The models, i have nothing to say, but they are simple and cute.
The game is simple as hell, but all of the invisible walls ruin the fun.
Also i recommend you to use other skybox's than Unity's default one.
Since the game is easy and 60 seconds, make more games. I am interested.