Interesting game idea, but with some flaws.
First of all, if you make a 3D first person game, you should have settings in your game to adjust the mouse sensitivity. Best would be to have separate sliders for both axis and invert options for both axis. I know it's a game jam and time is tough, but settings like this help player enjoy the game more. I would suggest you add them now and see how it's done best so that you have that code ready for the next jam 😉
I assume that you have implemented the character controller yourself, right? I would suggest you check out this neat little asset from Unity itself. https://assetstore.unity.com/packages/essentials/starter-assets-first-person-cha...
You get a working first person controller with sprint and jump functionality. Works very well out of the box.
Regarding the game design/level design. I would suggest reducing the amount of raccoons and remove their ability to steal the presents that you are holding in your hands (super annoying). Also reduce their speed so that you can catch them easier.
Looking into the boxes should also be faster and there should be a way to discard the boxes in case the chainsaw is in it.
I really like the art style and snow particle effects. Looks great and it is consistent. 👍