I adored playing this, especially the glitch sequence and watching the video on that bridge. I think your sound design is strong.
I think the game could benefit from a stronger narrative arc, i.e. beyond the fact that there are cool interactive features, what is the story? In our game design class, someone designed a class around the 5 stages of grief, and I know there are many games/VR experiences around psychological themes. It would be cool if each "room" or experience that players embark on in your project has a thematic link. So in other words, that the hand tracking has a purpose beyond moving or catching blocks. Alternatively, you clarify that the game is a playground and each scene is a different "technology interactive game."
I think adding sound effects to your player for when they bump into walls and experiences would also be great.