New levels please! – Letter Bounce Review

I have finished all 400 levels!! I have played level 400 several times in hopes levels 401 and higher show up, but nothing happens. Just takes me back to 400. I even clicked on 'skip level' when I was in 400, but there are no higher levels. When will levels 401 and up be available? Thanks!
Review by bblackman on Letter Bounce.