オッオッラライ・オッオオッラライ! <— LOL at the romanization
IOSYS are the ones responsible for creating the music found in Touhou Project, a sidescrolling shooter doujin soft created by Team Shanghai Alice.

This flash is IOSYS’s promo video for their album – Invisible Full Moon and this song is apparently from Touhou Project 9 – Imperishable Night (a game I wish I had). Locker Room Productions was commissioned to create the flash and they did a good job.
Like all flashes this one is extremely random. Leek Spin?! LMAO. DDR? OMG. WHAT!? EASY MODE? The flash itself was very well done and it was synced perfectly to the music as it should considering that it is a music video. Gabba is a strange genre of music and it must have been fun to make a video for this song. Usa no mimi ftw.

Watch it here!

-exo