i got this game to play with my son, who was a little too young to play maternational when it was out. we played for about half an hour before he wandered off saying "it's not really fun.." and i couldn't even bring myself to play it alone much for the trophies. it puts me to sleep. seriously. when i was going to bed 2 hours early last night, my wife woke up enough to say "you're coming to bed already?" and i said "yeah, the game sucks, and it's putting me to sleep."
in a few of the race types, you have to get somewhere far away, with little indication of a route to get there. in another race type, you have to race as the little tire changing car whose name is apparently a dirty word so it wouldn't let me post it. luigi's friend. he spins out for absolutely no reason.
other than those, you can purposely get way behind on the first lap making sure to pick up the stars, and by halfway through the second lap be in first.