A really hardcore fan of Mio of the K-ON! anime series created a mini game featuring his obsession, Mio of course. He used the handheld Japanese Nintendo DS game Made in Ore (Made in Me) from the WarioWare series. This game allows users create their own mini games where they can create their own graphics and music. You can find the mini game here in Nico Nico Douga. Nothing mind blowing but pretty neat nonetheless!