Which game is in the picture?
Correct answer: Tetris

Waldo Lydecker
Honorable mention demands another clever idea from the 1980’s from none of the usual suspects in that this gentleman was from Hungary, Erno Rubik. I’m grateful for his invention for it gave me humility. Even though I’m a member of Mensa since my teens, I’ve never been able to solve his famous Cube. “Koszonom!” - that’s “thank you” in Hungarian.

Gun Dark
Level 9-5 on the gameboy edition (1991) was pretty tough.

YottaGeno
Better Than Block Blast