I liked the level design. Movement is bit off but fast so I like it. There is some tips I would like to give:
-Some audio feedback for collecting items would be really good. Especially because of first person view its hard to say. I look back lot of time to see if I got them or pass by.
-There can be a counter at the screen showing how many acorn we collect and how many left. Also I think reducing number of collectibles would be a good idea.
-I suppose Blender is used in making of this models. In that case I would suggest to apply "Shade smooth" to them since most of the models have a sphericial shapes it would look better than multiple sharp edges.
-Also I suggest to play with Spectecular, Roughness and Metallic properties of the materials to get wanted shading and reflections.