My idea is called Smash Derby

 This game is a demolition derby with high- end car, there is also add-on levels like boats, space ships, robots and many more. there would also be different locations to smash-up the cars and many other things. Earning XP to get upgrades for your cars or buy new cars.

 You can select location of where the demolition takes place. London, LA, New york and many more. You can use the GPS on your phone you find the nearest city. The GPS can also be used to find your current weather where you are this can also be done to find other places.

 this game would have high-priced cars like Ferrari, Lamborghini, Jaguar, Audi, McLaren and Bugatti Veyron. You have the joy of smashing them up.

 There will be add-ons where you and buy or earn with real money and in game Xp. In the add on you will have boats, space ships, robots and planes

 The debris around the area to interact when you driver over it, the dirt would kick up when you drift or wheel spin. On tarmac when you wheel spin smoke will appear and tire tracks will appear and will stay.  You can tilt the devices to steer the cars touch screen to accelerate. The GPS can be used to find current weather from where you are and to find the nearest city to use there demolition arena

 The app would be suitable for both platforms of tablet and phones this is good as you can have motion when steering and take it anywhere when you are bored you can pull it out of your pocket and play. the app would run on IOS 7+ and android 4.4 KitKat+. the phone would require a gyroscope to control the cars. HD graphics is used so a HD type phone or tablet would be required. I would add simulated weather so your GPS would pick up your location and simulate the weather in your area, this would also work if you selected the location in the menu.

 The target audience is aged 5-12 years old males this is because children like cars and like to smash them up. They like to interact with the game so the gyroscope would allow them to dive the cars by tilting the phone or tablet. kids like to play games where there is lots of destruction and easy controls. The game is free with buyable add-ons