Codefly

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About

Codefly is a Duolingo-style, browser-based app for learning real JavaScript. It has short lessons, hands-on exercises (including sandboxed code that learners actually run), XP, streaks, levels and badges, spaced-repetition review, certificates, and weekly / friends / all-time leaderboards. Progress is stored in the browser first, optional Supabase cloud sync adds sign-in and cross-device progress. Curriculum covers JavaScript fundamentals through array methods, recursion and OOP. Tech stack: React 19, TypeScript, Vite 8, Tailwind v4, React Router, Framer Motion, CodeMirror 6, Supabase (Auth + Postgres), Vitest and Playwright tests. Status: pre-revenue, roughly 1-2 free users and no traffic - this is a sale of a finished codebase to build on. Included: full source code, the Supabase project and schema, and the brand / logo. Not included: a domain name (the buyer needs to use their own). Reason for selling: I want to focus on other projects.