Where there are not enough coins top get a Perfect, you need to make it 'exciting', to gain bonus coins. When the heart appears over the cars, you get a bonus.
American, British, Asian, and other words like that are all proper nouns, as are the names of the associated countries or continents. Thus, they wouldn't be accepted, and should also be captialised when spelled.
 "Space is Key"){kind=icon}
 "Rollercoaster Creator"){kind=icon}
 "SteamBirds"){kind=icon}
 "Copy Cat"){kind=icon}
 "Clockwords: Prelude"){kind=icon}