Koopa Cape is a pleasant looking track, but that under water tube part feels dead to me. Also I don't know why it's own soundtrack is less enjoyable that the one from
Mario Kart Wii - Koopa Cape by BowerFan on DeviantArt
Koopa Cape | Wiki | Mario Kart Amino
Stream Mario Kart Wii - Koopa Cape (MK8-Style) by Hyuga | Listen online for free on SoundCloud
Mario Kart Wii Time Trial: Koopa Cape (2'27"064) - YouTube