Code with testing in the browser
In particular look at
The cube is there but... there is a MISTAKE in the code (ok ok you got it by now... I sabotaged the code!). The problem is that you are not a wizard. What you head should move isn't the cube but rather the perspective of the camera. Fix it and enjoy the cube in... VR (yes well it's a lovely cube)!
Jump to Mission 3 to be able to interact with objects like a wizard on purpose this time!