Heads up, just sent an e-mail to feedback, with an error on starting up the system on powershell. Not sure if it's my environment or not.
Then you have to "Unblock" the downloaded ps1 file (Properties, click Unblock at the bottom).
Next you have to make sure that java.exe is in your path. After that you are good to go!
http://temp2.kodowa.com/playground/light.ps1