Love the visual style, gives it a nice feel. Drag and drop is a nice interface too. I stopped at the first island as I think i'd like to wait for the full game.
I think a simple thing to have done here would be to relax the bronze requirements. You still need to do really really well in a song just to get bronze.
Awesome concept - i don't think the controls are that bad, they just need tightening up - more that the amount you move your mouse doesnt relate easily to where the people end up. But nothing is better than launching people at cars, cars at people, tanks at people, people at planes.
Nice gameplay. Fun for a quick mess around or if your into high scores. Maybe some variety would be good - possibly room changes now and then, or even, a campaign mode where you fight through a school or mall or something
Very nice, simple idea - the changing colours takes it from something that you can just react to, to something that takes skill. Unlockable hats is awesome idea.