Well, this is one interesting game! Good job. I really like the 3D pixel art style. I was a little bit surprised by the ghost. I like the music too. The dialogue is pretty fun and, though I could not finish the story, I am interested about the rest of it. It was fun to explore how I was going to continue forward in the game. I like the atmosphere of the game.
It seems like the ghost disappears when I pick up my bag, but this becomes quite a problem when I need to climb and pick up the bear. I cannot climb with the bag on, thus I need to take it off. But the ghost is directly beneath the tree when I try to go down again and I cannot pick up the bag. Therefore I cannot continue the game.
One bug I found is that you can still move after getting Game Over and the game does not actually restart nor does the quit button work. Some checkpoints would be good to avoid restarting from the beginning.
I hope that you update the game or make a post game-jam version. I am interested to finish the whole story. Good work!