Can you say something more? I mean it doesn't sound bad but if you want someone to pay $5.00 USD for your game you should have at least a decent trailer. There are plenty of other games for $5.00 or less therefore you need convince me to buy your game instead of another.
The idea is good. In my opinion a contemporary touch to the GUI would be something interesting because the game looks a bit like an early 2000's game. Personally I would like a game of early 2000's style with a modern touch into it.
Keep up and good luck!