Spent SEGA Miles to unlock following tracks.

Track	How to unlock
Bingo Party	30,000 SEGA Miles.
Dark Arsenal	30,000 SEGA Miles.
Deadly Route	80,000 SEGA Miles.
Highway Zero	90,000 SEGA Miles.
Jump Parade	60,000 SEGA Miles.
Lava Lair	60,000 SEGA Miles.
Lost Palace	10,000 SEGA Miles.
Monkey Target	50,000 SEGA Miles.
Ocean Ruin	20,000 SEGA Miles.
Pinball Highway	20,000 SEGA Miles.
Rampart Road	50,000 SEGA Miles.
Rokkaku Hill	80,000 SEGA Miles.
Sandy Drifts	40,000 SEGA Miles.
Sewer Scrapes	70,000 SEGA Miles.
Sun Fair	70,000 SEGA Miles.
Thunder Deck	40,000 SEGA Miles.