I like fiction for game, living underground and constantly raining make it interesting.
You did great job with that simple mechanic of signs with tutorial information, that's great and simple idea *clap*
I did passed game and had some time, i was just curious what will happen next day. That's nice game loop that keep player engaged.
What i would improve is adding some health bar to mushrooms so i know how much more of axe hits that will last, lack of feedback made me nervous i did something wrong :D
Just keeping less mushrooms would give me more feedback about my progress, but progress bar at top was enough to understand that im doing something in good direction.
Congratulations on your submission!