SCRIPT-8 is a fantasy computer for making, sharing, and playing tiny retro-looking games (called cassettes). It’s free, browser-based, and open-source. Cassettes are written in JavaScript.

However, Dominic Szablewski has recreated the game in JavaScript for an online competition, producing an executable that is a mere 13KB. The slimmed-down game, called Q1K3, is hosted on JS13K ...