Excitebike (1985) was a launch-window NES game with a feature that felt impossible at the time: a track editor. Design your own course, place ramps and hazards, and race it.
(Without the special data recorder you couldn't save your masterpiece. Lose power and it was gone.) The racing was all about heat management: lean into jumps, weave through mud, and don't redline the engine or you'd overheat mid-track.
Simple, endlessly replayable, and that editor planted a "make your own levels" seed in a lot of young brains. A pure, perfect early NES game.
