SOURCE: Game Boy Color RND 4-JNG Alright! You missed the secret level. It’s okay. Here’s your regular round 21. Play well with water bubbles, and you’ll have your diamond prize. Study the Pulpul patterns. Don’t kill yourself trying to reach the special item from below, unless you’re really cool. Those Game Boy Color developers sure had some sense of humor – putting such a nasty level as round 4, albeit on a secondary branch! The name for this level is a nod to the Central Cavern of Manic Miner, even if I don’t recall why.