CHEATS
Highlight Options at the main menu and enter the following cheats:

Drive Tow Jam Car   C-UP, C-DOWN, Z, R, C-LEFT, C-RIGHT, C-UP, C-DOWN
Mirror Mode         Z, R, Z, Z, R, Z, Z, Z
Race at Night       C-UP, C-UP, C-DOWN, C-DOWN, C-LEFT, C-RIGHT,
                    C-LEFT, C-RIGHT
Stealth Mode        C-LEFT, Z, Z, C-UP, C-LEFT, R, C-DOWN, C-UP
Unlimited Turbo     C-RIGHT, Z, C-UP, C-DOWN, R, C-LEFT, Z, C-RIGHT
Wireframe Mode      C-UP, Z, C-DOWN, C-LEFT, C-UP, Z, C-DOWN, C-LEFT