Maniac is much older than this game.

around the two 7segs are 8 leds in a circle, and a button for each led. It's for 1-5 players (take turns), there are 5 minigames.
Games 1 and 2, probably meant to play with a dice.
Game 3: press button opposite of the lighted led.
Game 4/5: press button when led turns on. You get points for each button press, and it's easy to 'overflow' the score here by pressing the same button multiple times fast. This eventually locks up the program. Bad bug.

I'm voting for canceled product.