Tetris, but violent. With apologies to Raph Koster.
Humorous re-creation of the Cuphead tutorial in response to this infamous video:
Affectionate parody of Dear Esther and Cookie Clicker - Somewhat of a half-measure, because I still tried to make it a "work" as an example of both genres, and not too "bad on purpose". It's also deliberately exaggerating aspects to highlight the design flaws of both its inspirations.
Parody of Torchlight 2/Diablo 3 - You walk around and click monsters to death, while picking up loot