You could show a preview image (or multiple ones fading) when you select a level.
also you could highlight the currently selected level a bit.

regarding the level information: placing them in 3d space with some nice animations would be cool... however I don't have any specific ideas (and maybe it's not worth the effort)

edit: almost forgot ._.
looks great, can't wait for the release (yeah I know, you get that a lot but I'm really looking forward to it)