Very cute and chill. Got the axe and pickaxe, didn't interact with the shop at all. Collected around 24 mushrooms till I died and gave up.
I liked the music, the environments, and the nice unique font. I do think monsters could be a bit more difficult, and would like to see a bit more changes between day/night other then day is safe, and night is dangerous. Could do something like paths that only open at night, or special mushrooms that can only be obtained at night. A few NPC quests would be very cool as well (And they could have unique mushrooms)
Some more puzzle would be cool. Seems like it's just begging for some pusher puzzles.
A sound menu, and save/load would be nice obviously.
Bugs:
Sometimes the "new mushroom" text is cutoff by the top of the screen.
If you switch screens after getting a mushroom, the text will still be seen (clipped like above)