Neon Asteroids
A complete arcade game rendered into terminal cells: fixed-step physics, toroidal wrapping, swept collisions, asteroid splitting, particles, waves, lives, and score.
The playfield is a braille Canvas, while Fleury focus, pointer input, tickers, semantics, and presence effects provide the application shell. It is deliberately deterministic, making visual and timing regressions testable instead of turning the showcase into a lucky animation.
Try it: press Space to launch, then steer with A/D/W and fire with Space—or click and drag directly in the playfield.