Challenge Mode
Complete every stage making
sure to not skip over any when the path branches off and beat the game. The
question marks on the main menu will now say Challenge.
Hard Mode
Once you beat the game. World
7 will be accessible. World 7 is a faster and far harder form of World 1.
Beating World 7 will unlock 8 and back to back up to World 12 all of which are
harder versions of worlds 1 through 6.
