Is it broken on my iPhone or is it just a tilted map with a circle overlaid?
There's a screenshot on the linked site which leads me to believe that is the indented behavior. Doesn't seem that similar to PG, as the title implies.
It isn't that you support desktops so much as you support everything. The beauty of using HTML5 and JS is that you'd actively need to put code in to block it working on desktops.
Self promotion is commonplace, acting like a non-interested third party with effusive praise when you're really affiliated with the project... that's when there's a problem.
There's a screenshot on the linked site which leads me to believe that is the indented behavior. Doesn't seem that similar to PG, as the title implies.