Denki Groove Jigoku V

In 1998 Sony released a music game for the PlayStation produced by techno outfit Denki Groove called Groove Jigoku V. The game is a collection of different mini games. Then you go see the Beit Devil. He gives you a random selection of minigames, or rather part time jobs, to play. I think there are several of them, Some are unlockables. Many of them are just one button. They all got sharp 2D bizarre graphics, usually either in a spare geometric style, or using digitized images, and have clear button control diagrams. The game got a sequel in PSP called Beit Hell 2000. The game is also known as Denki Groove Jigoku Five.