Needs some work, but good.
These are my opinions:
Instructions & Goals should be listed somewhere. I wasn't even told was exactly I was doing and why, and what the count down represents.
It needs some type of music. Lack of control put me in this situation:
When I pressed the right button, I was scared to death from the loud sound; that said, music will provide some relief from that perching sound.
Suggestion: Maybe include a Chris Brown song that deals with domestic violence, or how much he loves a girl (the irony would be awesome).