Then the plot thickens - you can't visit any bonus stages in the training levels. Unless they give you 10,000 points for spawning a giant ring at the end. Fun fact: there's no point in having a score counter in the HUD for the training stages, because you can't get points during play. Even if you destroy the platform badniks, it doesn't award anything. So at some point they put in a fix to stop it reading -1 in those levels... and now it only ever reads 0.