Siliconera: Opus Studio seem to love utilizing time as a gameplay mechanicIn Half-Minute Hero, the clock is the greatest enemy since you only have thirty seconds to save the world from explodingJikandia: The Timeless Land, a side-scroller from the same developer, has players set a time limit for a level and the game adjusts the stage accordingly.

The kind of treasures, enemies, and even layout changes depending on how long you have to play Jikandia.