Oooh man, this is an awesome idea. I will be playing with this soon.
But just one suggestion: video footage of the app being used on the page, front-and-center.
The live logo is really neat, but it doesn't really convey anything about the purpose of the app.
I'm already familiar with Theremins, but I'd bet a lot of your userbase wouldn't immediately grasp the nature of the app from what's on the page if they haven't seen one being used before.
But just one suggestion: video footage of the app being used on the page, front-and-center.
The live logo is really neat, but it doesn't really convey anything about the purpose of the app.
I'm already familiar with Theremins, but I'd bet a lot of your userbase wouldn't immediately grasp the nature of the app from what's on the page if they haven't seen one being used before.