After allowing the location lookup, I don't get anything in the 'cities in your view' drop down.

I think that means you've gone through the stargate and you're now in Alpha Centauri.

yeah it's a thing I hacked on today :) (UX wasn't the main focus :P) anyways, the dropdown will be populated when you point in the direction of a stargate with your phone ( compass or knob )

Oh. In that case, doesn't work on desktop ;) Might want to say so in your readme.

This is confusing to me, I tried the demo but had no idea what it did.

it's stupid.. use your phone to have a compass, rotate your device, and discover stargates to which you can teleport.

just a simple assignment that I found amusing.