Shotgun Upgrade is so over-powered! I should probably consider limiting them in this mode, cause really now. The grenade upgrade is pretty strong too, but those require more effort to do anything with!
Now since y'all are so adamant about it, here, have a list of music!
Airship - Super Mario Brothers 3 Airship - Super Mario All-Stars Airship - New Super Mario Brothers Wii Airship - Super Mario Galaxy Airship - Super Smash Brothers Brawl King's Chamber - Super Mario All-Stars World Clear - Super Mario All-Stars