Code Runner

Code Runner is an endless runner arcade game for developers. In it, the player sprints along a terminal floor and jumps over hazards named null, undefined, NaN, and runtime bugs; missing the timing ends the run with an uncaught exception. The page frames it as a coding break that fits into the time it takes a test suite to finish.

The game uses a single-jump control scheme: Space, arrow up, click, or tap. It includes speed ramping, so the run gets faster the farther it goes, and it scores by distance, with meters becoming the score. Best distance is saved locally across reloads, and a run can be shared in one click to challenge other developers. The play instructions also say that Space or tap starts running and can be used again after a crash.

Code Runner is built with the HTML5 Canvas API and zero external dependencies, and it runs on desktop and mobile without install or signup. The page describes it as free browser game, and the metadata repeats that it is free and has no signup. It is presented as a browser-based game for developers rather than as a general-purpose tool.