yes make the difficulty harder after the difficulty is roorhell custom difficulties are allowed yes you are allowed to add random songs before roorHell is supposed to be dqrk's difficulty chart on roblox actually but actually is allowed to add jjt difficulties, if you forgot the Dqrk's difficulty chart in order then watch this video on youtube: https://www.youtube.com/watch?v=Y8yo7DHNyro only @AzfarPogko can change rules
