No Destination Mark Mode:
Hold Y at the character selection screen.
No Arrows Mode:
Hold Start at the character selection screen.
Expert Mode:
Hold Start + Y at the character selection screen
Bonus Characters:
Finish the crazy pyrimid then you can play as everyone in the first game and on a bike or stroller.
(supplied by: Gyrin)
Jump further:
You can go further if you hold the Y botton on the jump.
(supplied by: Ripped Boy)
