At the recently held Datastorm 2013 demoparty, Genesis Project released a short but fine Gameboy classic demo named DMG*P-01. The music could have need a bit more pressure, but is okay overall. Two nice graphics are shown, which should at least convince you to spend time with the YouTube video.
DMG*P-01 by Genesis Project (Gameboy demo)
AEP-Emu (DE/EN)
DMG Page (DE)
Indie Retro News (EN)
Retroguru (EN)