Mario levels are usually indicated to belong to one of five types (overworld, underground, athletic, castle, underwater)2. The type determines the aesthetic style of the level, but also affects the challenges that are posed. For example, athletic levels usually contain platforms that are spaced far apart, as well as moving platforms. They thus require precise and timed jumps to traverse.
2019, S. M. Lucas, V. Volz, “Tile pattern KL-divergence for analysing and evolving game levels”, in Proceedings of the Genetic and Evolutionary Computation Conference, page 171