seed: any level can be recreated by specifying the exact same parameters, including random number seed.•Difficulty: affects the complexity of levels generated, sizeof gaps, etc.•Type: overground, underground, castle (indoor environ-ment used for bossfights).•Length: the length of the level. Thetime limitcan also becontrolled.•Creatures: bit mask specifying the presence/absence ofparticular creatures.•Deadends:the frequencyof levelconstructs that may forcethe player to backtrack and try another route.•Gravity: affects how high and far Mario can jump. Severalother physical properties (e.g., friction, wind) can also becontrolled