First, congrats on your first game and first game jam! To think that you managed to make this without much experience in Unity and game dev is very impressive. The game functions well, everything looks polished, and the puzzle is good.
To make the game even better, I think the character's corpses can be more stable and cubic. Maybe it is your intention to add difficulty to the game, but I think the corpses rolling so easily from any slight movement can make the experience very frustrating and tedious very fast. And it appears that this rounded design does not serve any significant functions, so it probably deserves some adjustment.
Overall, a very well-made game with fun puzzles and cute models, made in merely 10 days. You should be proud. Great job!
Also, your game is quite similar to ours in many aspects, which is interesting. :)