It’s a cool idea, but as you seen to be aware, opens up a lot of potential for problems. I don’t have anything against such an entry since you’re willing to police the links, but keep in mind any DMCA related incidents could result in itch banning your account. It’s up to you if that’s a risk you’re willing to take.
One alternative is something like what Audiosurf does, where the levels are linked to metadata tags and the player needs to get the song file themselves.
Hope that answers your question.