I had three goes at the game in hopes of figuring out the second time but still didn't get anywhere with it unfortunately. I think the concept is really cool and there are some good bones here! I couldn't figure out if there was any indication where food might be found or if it's purely luck, and got frustrated with that uncertainty. The controls don't always feel very reactive, often it took me several clicks to thump or burrow, and I don't know what the thumping does - will happily play again if I can get a hint!
I think more communication with the player would be helpful. For example, an indicator how much time is left til dark, or some indication what that bar under the player does, because I don't know. The first time I played I also already had a root in my inventory but don't know how I got it. It would be nice if something could indicate more clearly when you collect a root, be it a sound or a more noticeable popup or effect.
I'd also recommend making the number in the top right a darker colour so it better contrasts the snow!