Chiptune Commission

[ianthegecko.livejournal.com]

Hello everyone,

I opened up for commissions for chiptunes (old-school video game-style songs) and one of my watchers sent me $20 to do a cover of the "Adventure Time" theme song. Is this even legal, considering I'll probably post it on FA? If not, I should probably refund the money.

I took a request for a public-domain hymn a few years ago, but this is entirely different.

Thanks for any advice.