Levels by Dan Wentz
If my memory serves me right, Dan Wentz was an employee of Parallax software, where he worked as level and
music designer. I remember holding my breath whenever a new level made by him was announced,
and whatever he produced was excellent and by far exceeded the standards of the amateur level designers
at their time. So here are his levels, they're few, but they're great! 
My 'rating system' is very simple: As I intend to only present levels that stand out from the crop, there will only be three ratings 'excellent', 'superb' and 'outstanding', with the latter being the highest rating.