You probably have noticed that there is an agreement pop-up when you open the editor. Here’s the full text for your convenience.

<aside> 📃 Here you can make your own custom levels, or play imported custom levels from other creators.

When sharing level files or making video content, please be respectful to musicians and follow these guidelines:

You can find a list of musicians who have given permission and those that have declined permission here. You can find a quick and easy template of how to ask a musician for permission to use their song here. You can find more information and more custom levels on our community's Discord server: https://discord.gg/rhythmdr

Legal notice: Please note that you should comply with the End-User License Agreement. You can find the EULA on our game's Steam store page. All third-party claims regarding ownership of images, audio, or other material present in the content created and shared by the user using the Level Editor will be the responsibility of the user. Infringing the copyright may face corresponding actions such as DMCA takedown or accusation. Use at your own risk. Thank you for reading, and enjoy the level editor!

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You must comply with these clauses before publishing any custom level. For those who are not familiar with a text wall, here's the summary.

<aside> ⚠️ You need to get the artist's written permission before showcasing your level to the public.

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Next: How to get permission from an artist