2D game information
Course slides
Example top-down adventure (zelda-like) games
Good examples of extended or flexible features in games
Mario Crossover
Baba is You
Platforming terminology, game design, and history
Example platforming games
2D platformer gameplay - videos and instruction manuals
Art and Sound assets
Sprites
Sprite editing and source rectangle related tools
Sounds
Extras
Research related topics - Infinite Mario and Mario AI
SIGBOVIK (satirical computer science conference) papers
2D graphics and game development for older hardware and/or alternative software