App idea: 16bit Run

Use your phone's GPS, and overlay a retro styled side-scrolling landscape of the area you are in, in real time. <br><br>This landscape would be populated by retro video game enemies roaming around. You could collect power ups like cherries (health) mushrooms (power) and flowers (invincibility). You could collect coins (points). 5 coins buys you a power up. <br><br>Your GPS location would control the game character's location on the screen.<br><br>This app would work anywhere - walking, running, biking, skiing, etc.<br><br>It would be fun to play it as you walk into a coffee shop. You could have a leaderboard of the highest scores achieved at each cafe.