Ah, and headphones are definitely recommended.
I'm busy collecting feedback and making the next v1.1 better. Adam Saltsman shot me some good advice as well as my coworkers. Will implement soon.
Here are two codes you can try for free redemption. Save you $0.99! First come, first served.
Codes: T9T3X6P6PHFA and LN666KHMTTKE
iTunes Info Page: Audiorun