http://www.netrover.com/~timt/cheats/c/chasehqii.html (Amiga Plus Extra No. 5/97, 05/1997)Pause the game and type "IN A GARDEN IN". If this doesn't work try "INAGARDENIN".
'N'-------------------Skips levels
'1-6'--Jump to corresponding level
'W'-------------------Rocket thing
'T'----------------------More time
Hold 'H' and 'F5' while the game loads and all the roadside obstacles will be gone.