Coolie Mazie Paloozi is one level I've been fond of for ages. It's the first level that ever got me into memory and when I decided to go for it as my first extreme it was such a fun level to grind out. The gameplay is incredibly satisfying and the song and visuals work together to ramp up the intensity and the chaos as you delve further in the mazes. This is such a good example of how to do memory right.