The Kingdom Hearts and Fella* shirts are a pretty nice touch - alongside the fast-paced pop-punk guitar of "Riffs for Days", they do plenty to enhance the '00s-era throwback vibe. It does seem the track doesn't loop once it finishes, though - that kinda sucks.
As a quick aside, the YouTube link in the sidebar's broken - if you wanna listen on YT, here's a link: https://www.youtube.com/watch?v=LgzgAz84HqU
*For anyone lacking context, Fella's the horned(?) guy giving a V sign - he's deviantArt's former mascot back when the site actually mattered