Before starting the level you have the option to change the "visuals"
you will be using the letters A to H. Complete a maze with each letter to earn it.
note that the DLC and Bonus visuals Aren't required.
if you have just started playing the game it would be a good idea to do this
whilst completing all the score attack and time attack levels,
changing the maze visual before completing each one.
after 8 levels you should get this achievement.
if you dont and are unsure of what visual you may have missed, or completed the game before getting this achievement (like I did)
Playing through: Championship II - time trial short 6 will only take you 20 seconds or so, use this level to earn you this achievement in mere minutes.
killing yourself before the timer ends counts towards this achievement too.
*The BGM and character options don't affect this achievement
Happy hunting!