Will it really be much better if you get the effects juuuuust right?

Time to release it!

Take your time.
I don't want to be the last.

Don't worry, Frownland will probably be the last (to release a track that actually fits the specifications of the challenge).

I'm probably going with dance music.

He'll add 20 seconds of more or less rhythmic drums to his 45 minute drone and call it pop.

That would be very disappointing. I was promised a real top 40 dance hit, and damn it, I want one!

Am I supposed to sing or is an instrumental good enough?

No rules about this.

I think going with no vocals is allowed. For that matter, a lot of blues consists of 1 minute of singing and 9 minutes of noodling, so...

Okay. I was going to try and write a song about Frownland's disgruntled neighbor who gets upset every time Frown starts making music but the twist at the and was that the neighbor was just jealous of Frownland.