I love the monochrome art and the somber music, it really makes for a relaxing game that still makes you feel like you're doing something 'important' in the game's world. I think it was explained very well, and at no point did I feel confused (except I missed the thing about mushrooms initially but that's on me!)
If you wanted to work on this post jam, I would perhaps recommend making it so in the resource gathering stage, you get greater rewards based on a smaller difference between numbers. At one point I got the difference to be exactly 1, and was a little disappointed that I got the same result as if the difference was 99.
Still, great work, I might even come back to play this for fun after rating a few more games!