Complex sentence: The Lost Levels is a 1986 side-scrolling, platform video game developed and published by Nintendo as the first sequel to their 1985 smash hit "Super Mario Bros." The games are similar in style and gameplay, apart from a large increase in difficulty.
Split into simpler sentences: The Lost Levels is a 1986 side-scrolling, platform video game developed and published by Nintendo. An installment in the "Super Mario" series, it is the first sequel to the 1985 video game "Super Mario Bros." The games are similar in style and gameplay apart from a large increase in difficulty.