I've made my own collections of stages using Manlyman PU as well..
1-5, 1 being the lowest, 5 being the highest
Collection Name: Robot Masters
Overall Difficulty: 1-2
Description: My 8 RM's (at the time, most of the names have been changed) stages if they were to have one. This collection is symbolized by having the RM names as the stages. Advised for Beginners to Rozark's Creations.
Collection Name: Ninja Collection
Overall Difficulty: 3-4
The stage's difficulty that defies the laws of this collection: 5++
Description: Once thought to be a brutal collection, this collection's value was lessened by that of Masters. This collection is usually symbolized by you spawning from a giant shuriken. Advised for Advanced people in Rozark's Creations.
Collection Name: Masters
Overall Difficulty: 5+
Description: God have mercy on your soul. These stages are in no way impossible, just extremely difficult. Traps, Puzzles, and Action awaits as you travel through a world of hell. This collection is usually symbolized by being in 8bit and having some sort of gimmick for the boss fight. You're also only given 3 weapons, of which you are advised to conserve ammo for the times which you absolutely need it. Advised for Masters of Rozark's Creations.
Joke Map: Castlevania
Play as Knight Roll and travel through a castle, whipping candles (balloons) and overcoming danger!
Joke Map: The Arena
Prepare your Guile music as you head through 40+ planned rooms, each with it's own obstacle! No checkpoints, no health, and you only start at half health! How far can you go?
The codes for these will be posted soon. (Whenever I finish the Masters, I'll post them all at once.)