Tetris , the addictive building-block video game , turns 25 this month . CNN speaks with Alexey Pajitnov , the game 's creator , about its popularity . Last year , 10 percent of all games on mobile phones in the U.S. were Tetris . First of all , it 's a very simple game and it has a really strong creative spirit in it . Pajitnov : ` I think it is a very good example for how to make something that people can play and enjoy without getting bored or tired after playing it for 20 minutes' Score:
Tetris , the addictive building-block video game , turns 25 this month . CNN speaks with Alexey Pajitnov , the game 's creator , about its popularity . Last year , 10 percent of all games on mobile phones in the U.S. were Tetris . Pajitnov : ` I think it is a very good example for how to make something that people can play and enjoy without getting bored or tired after playing it for 20 minutes' Score: