You may not know your city as well as you'd like to think. A new app from developers Thickpolicy, called Strut paints a stark, if cheeky, picture of just how little you really see of the world by covering it in opaque tiles that are only overturned when you physically travel to the space they cover. Its interface is reminiscent of old school Nintendo platformers—complete with nicely overwrought pixellations—and recalls their “world maps,” where completion of a level revealed a previously unseen area.

Score is based on the number of tiles you’ve overturned, and like Foursquare and other trusty location-based workhorses, specific activity unlocks badges. Your worldliness is ranked against others, as if in a global arcade game, and tiles over terrain-less-traveled and/or less covered by mobile networks (water, anyone?) sometimes unlock special bonuses, too. And so, perhaps most compelling about Strut is that it puts in sharp perspective the insular, repetitive trajectories we're prone to taking. And suddenly it’s easy to see how you may be missing out by taking the same old route to work everyday. So, if ever you needed a reason to explore every nook and cranny of your city, this could be it. After all, a tiled-over world is a very small one, indeed.

As of writing, according to Strut's website, only .043% of the world’s possible tiles have been overturned by all users, so we’ve all clearly got some exploring to do.