Complete the indicated task to unlock the corresponding bonus level.

Billboard-o-rama: Complete Hanging Gardens.
Blob Smash: Get a Gold Medal in Chroma City Fun Park.
Crane Fighting: Get a Gold Medal in The Chroma Dam.
Deep Down: Get a Gold Medal in Ministry of Ink.
Factory Run: Complete Chroma City Fun Park.
Forgotten Forest: Get a Gold Medal in The Docklands.
Hill Climb: Complete Ministry of Ink.
INKT Acedemy: Complete The Chroma Dam.
Inky Canyon: Get a Gold Medal in Hanging Gardens.
Jetbike Blitz: Complete Guggentraz Island.
Leaps of Faith: Get a Gold Medal in Uptown.
Lost Freeway: Get a Gold Medal in Downtown.
Miles O Silos: Complete The Docklands.
Seaside Roller: Complete Last Resort.
Ship to Ship: Complete Uptown.
Sinking Feeling: Complete Lake Raydia.
Sizzle Race: Complete Downtown.
Top of the World: Get a Gold Medal in Last Resort.
Tower of Power: Get a Gold Medal in Lake Raydia.
Trainspotting: Get a Gold Medal in Guggentraz Island.