Firstly, this game is absolutely beautiful. All assets are distinctive, clearly distinguishable, and easy on the eyes. The Baby Fire is adorable (I only wish Mom had a bit more personality).
Another strength is the variety of challenges (Baby's hunger, Mom's hunger, grabby hands, snowballs, rain...), and the smooth way that they are gradually introduced throughout the course of the 5 minutes. This is some good design planning.
The game is rather difficult; I gave it 3 good tries, and I didn't make it through to 5 minutes. I think one thing that would help would be a warning when the player is getting too hungry. Mom has this warning, but Baby does not--I think it would be useful, even though we can see Baby's hunger meter at the top left, because it's so easy to get distracted with everything that's going on.
In the spirit of constructive feedback, I couldn't get used to how we open the crafting menu with Space but close it with E. Lastly, it might have been helpful for the left mouse button to be an auxiliary "interact" button.