Get 1 extra life
Reach 50 rings
Collect Invisible-Box
Collect Shield-Box
Complete any level with between 20 rings and 79 rings
Complete any level with between 80 rings and 99 rings
Collect green crystal (see comment)
Collect purple crystal (see comment)
Collect red crystal (see comment)
Collect cyan crystal (see comment)
Beat the game
Complete Hill Zone 1
Complete Hill Zone 2
Complete Hill Zone 3
Complete Hill Zone 4
Complete Cave Zone 1
Complete Cave Zone 2
Complete Cave Zone 3
Complete Cave Zone 4
Complete Star Zone 1
Complete Star Zone 2
Complete Star Zone 3
Complete Star Zone 4
Complete Aqua Zone 1
Complete Aqua Zone 2
Complete Aqua Zone 3
Complete Aqua Zone 4