Sadly, hit a game breaking pass-ability after not saving for a while. I'll go over that at the end.
Nice work on the custom character art. I enjoy the variety of designs throughout the village. The pacing in the storytelling is a bit too fast pace for me, but I'm going to chop that up to the fact there was only one month. The festival scene was choreographed well, just... yeah. Things moved so fast it was hard to get in the moment and process it. There's nothing wrong with dragging out small moments like watching the stars, or Koi getting sore and tired jumping down the cliffs and such to really set the mood.
Here's where the game broke on me. After walking on this bridge and getting the scene about the bridge having washed away, I could no longer step off the bridge. Not sure if it was an error with the passability or with the event itself. (the fact that the map just before the map at the end of the path east of the forest had a lot of passability errors, I'm guessing it was that.)
Congrats on finishing your demo and posting it! I may come back and play more of this if I have time, just to see what I missed out on. (but there's a lot of games to play!)