The source code is available here: http://www.team-duck.com/rift/files.php
The project is also on GitHub: https://github.com/teamduck/gametube
As noted below, this demo lacks any real gameplay. It's a proof of concept for a homegrown browser engine, and it's based off of efforts on different platforms originally.
It shows what a lone programmer can do and that not all tech demos need to be flashy. It also harks back to a more minimal development style.
Here is a command reference of the source code auto-generated with a script: http://www.team-duck.com/rift/reference.txt
Although it might not be clear from the GitHub repository, this project is over a year old. If I were to spend just a little bit of time on it, I would work on generating a sequence of levels through the space station. So I'm open to input for game ideas, too.