I think you got a good starting point: a good art style, a promising gameplay loop, but you failed in expanding it, more than a number and a sack, maybe an incremental element would be great for this game, it gets repetitive very fast. I miss a sprinting button on this fps character controller, and shadows on the trees, more game juice would work great, like you did with the trees you should do with the bushes too, tween their scale to a very small size and only after this make them invisible.
it's a good game, but it could be greater.
Just keep going!