Level 2 - perform a dynamite jump to get the unreachable coin Level 9 - pretty much impossible due to the crate with the gold bar being unreachable and there's no known way how to get it so far, besides 4 or 8 coins are missing aswell depending on your game version. The 4 coins are held by a seagull that doesn't spawn until you kill a certain enemy later in the level and as for the other 4 coins, I'm pretty sure their location is unknown. Level 14 - Getting a perfect score in the level is now possible in the later version due to it being fixed.