Web app (iphone) Beta

Hi, I'm new here and this is my first version off my web app to iphone, that control my arduino through usb.

would like some more ideas on how I could make it better. As I said, it's only a beta version.

The setup: Arduino (connected with USB)-------->>Computer (running an processing app)-------->>Web server (Wamp Server)

this is only a beta version. if any have any question it is just ask me.

Some pics of the app:

Start up screen: App: Two buttons on and off and a status bar at the top

so eventually the phone will be connected to the arduino via usb?