I liked the idea for the game but as it is it needs more work.
The idea of looking for food for food for your kids is fine, but I got lost easily. There could be some landmarks, or stuff like rocks, so I could climb on top and look for the den. There are also some bugs. It feels like every pumpkin had a huge hitbox around it.
The presentation could use some more polish too. I'm cool with low-poly graphics, but it seem like the only sound in your game is the music. Adding some forest and... mouse sounds would add to the atmosphere.
As for the theme, you could have explored it more too. I didn't get to the owl (sorry), and the Halloween was only represented by fall colors and pumpkins.
Over all- I appreciate the ambition, but I think you overshot. For a 4 day jam it's better to cut scope and deliver more polished, short experience than a bigger one, that's overscoped.