I hear ya!! There is in fact lots of things to improve this, but it's a great template of what i'm trying to get at. I would add WDAS support, but wouldn't that make my Project Eden competition entry null and void? I slaved hardcore over this to get it in on time!!
Yes it can still be simplified more. Consider it 'Guitar Hero' meets 'Space Invaders' with an innovative Music/Gameplay switching mechanic! Thankyou for playing :)