The concept is innovative, and the 3D visuals are fantastic! There are a few things to mention though:
1) The music would stutter when switching scenes (since I was playing the HTML5 build. So you should've loaded scenes asynchronously.
2) Whilst the 3D visuals are great, the UI of the dialogs were very eye-straining for me and I could barely read the white text on a bright screen.
3) The movement felt kind of weird. I wish the player wouldn't stop when turning around. I feel like it can be improved in many ways.
Other than that, you did a good job!