Cool looking game! I like the vibe. A few things things:
1) On my machine, it's loading pretty slowly. I almost closed the window because I thought it silently failed on the Unity loading screen.
2) Aiming is hard. It's frustrating when, after 4 swings, I'm suddenly not able to damage a tree, then time runs out.
3) Swing animations are very slow. Is there an upgrade for swing speed?
4) I did not know that I needed to bring wood to the fire in the beginning. I spent a few rounds unsure why I wasn't collecting wood after chopping down trees.