These worlds have been tested by the community and approved by the Hamumu team to meet the historical standards for inclusion as an official Add-On World. Unverified worlds will not count for certain kinds of in-game progression.

1. Content used by the world (e.g. tilesets, music, pictures) must either be in Public Domain OR follow the clauses of a specific license, such as a Creative Commons license. If the latter is true, a copy of the license should be included (recommended) or specified. Any content supplied with a regular installation of the game is exempted from this rule.
   
   
2. The world needs to be completed to 100% without the use of cheats.
   
   
3. The world must have all 4 keychains and a Key of Lunacy.
   
   
4. At least some of the levels must have an objective to collect Candles.
   
   
5. The world must have a decent amount of gameplay. As a rule of thumb, a world that can be completed in less than ten minutes is far too short.
   
   
6. The difficulty of the world must be balanced. It should neither be so easy that it can be completed while sleeping, but not so difficult to the point of reducing the player into angrish. World testing should be done on both the Normal and Hard difficulty levels to get a feel of how easy or difficult the world is, and whether it is too much of either.
   
   
7. There must be some sort of variety in the worlds. A world filled with levels that are all essentially empty rooms filled with monsters is NOT variety.
   
   
8. The world is NOT a disco ball. No crazy flashing floors that can induce epileptic seizures (laugh if you want, but it HAS happened on Television before so take it seriously).
   
   
9. Brain and Candle count must be correct for all levels in the world.
   
   
10. If the world includes custom sounds, they should take up very little hard disk space. The sounds included with Supreme rarely go beyond 100 KB per file.
    
    
11. For the most part, the world, the levels within and any monsters with custom names should contain no spelling, grammatical or punctuation errors. If there are only a few errors within a world, this rule may be ignored.
    
    
12. Don't forget to set the Author Name!