Successfully complete the game by finishing World 8 to unlock the "Sound Test", "Gachapon", and "Boss Mode" options as well as World 9. To access the new options, press R at the level selection screen.
Successfully complete Boss mode. World 10 is a series of time attack levels that includes a new Boss. To face the new Boss, you must complete level 10-1 with a time less than 0:45, level 10-2 with a time less than 2:20, level 10-3 with a time less than 3:50, level 10-4 with a time less than 2:10, level 10-5 with a time less than 2:50 and level 10-6 with a time less than 2:30.
In order to battle against the boss in World 10 you must complete the following levels within a certain time limit. 10-1 - 45 seconds 10-2 - 2 minutes 20 seconds 10-3 - 3 minutes 50 seconds 10-4 - 2 minutes 10 seconds 10-5 - 2 minutes 50 seconds 10-6 - 2 minutes 30 seconds
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