Hi thank you for the feedback. Yes, the intention was that you could only store supplies at the den's entrances at the right side of the tree. The artist was unavaliable the last day so i had to take care of the den's sprite and i'm bad at shades, so that's why it's not so obvious. The music seems to be an error with the audioplayer setting.
The game over screen is probably because we made it so the win condition required both the minimum of moss and acorns plus being at the dens entrance before the timer reached 0.
Ty for playing