To get this statistic you must collect all bonus coins in level. In some levels is easy to get it, and in some, when you try you for 95% die. To complete level you dont need this!
Wonderland (Game) Edit
In this game is PERFECT marked by stars in level select.
Wonderland: Secret Worlds Edit
If you look for PERFECT! in Wonderland Adventures series, stop it now! In that series isn´t map or something, so you logically CAN´T get PERFECT! And too, there aren´t bonus coins.