The following goals:
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Earn an "A" rank on each level and track in "Street Work" mode. Earn
a "S" rank on each level and track in "Street Work" mode. Complete
each level and track in "Time Attack" mode within the time limit.
Earn a "Perfect" rank on each level and track in "Coin" mode.

Bonus boards:
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Unlock all four bonus characters. Then, press UP(2), DOWN(2), LEFT,
RIGHT, LEFT, RIGHT, B, A at the board selection screen. The following
four bonus boards will be available:
   - Ika-Chu (Double jumps)
   - Father (Longer air time)
   - J-B (Press A + B for turbo jump)
   - J-Arm (Extra turbos)