5 Fun Projects Using OpenAI Codex

2026-06-17 · Source: KDnuggets · Field: Technology & Digital — Artificial Intelligence & Machine Learning, Software Development & Engineering, Gaming & Interactive Media · Depth: Novice, short

Summary

Kanwal Mehreen's KDnuggets article, published on June 17, 2026, showcases OpenAI Codex's utility in software development through five practical project tutorials. These projects demonstrate how Codex can accelerate development, ranging from building a simple first application in minutes to creating complex full-stack solutions. Specific examples include developing a Swift iOS mobile app with Xcode, prototyping an AI startup web app in one week, crafting a 2D beat 'em up game using Phaser and image generation, and constructing a full-stack Airbnb-style clone with Expo, React Native, Stripe, and Supabase. The article positions Codex as a versatile coding partner capable of assisting with feature planning, code generation, bug fixing, and integrating various tools across diverse project types.

Key takeaway

For software engineers or AI students looking to rapidly prototype applications, you should consider integrating OpenAI Codex into your development workflow. It enables quick iteration from idea to working product, whether building a simple app, a mobile interface, or a full-stack solution. Treat Codex as an interactive coding partner, providing clear instructions and consistently reviewing its output to accelerate your project delivery.

Key insights

OpenAI Codex accelerates software development across diverse projects, acting as a versatile coding partner.

Principles

• Treat Codex as a coding partner.
• Start small, test often.
• Provide clear instructions.

Method

Describe desired features, let Codex generate/modify code, review output, test, and iteratively improve through follow-up prompts.

In practice

• Build simple web or mobile apps.
• Create 2D games with Phaser.
• Construct full-stack clones.

Topics

• OpenAI Codex
• Code Generation
• Mobile App Development
• Game Development
• Full-Stack Development
• Rapid Prototyping

Best for: AI Engineer, Software Engineer, AI Student

Related on AIssential

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• OpenAI says Codex is coming to your phone — OpenAI's Codex now offers mobile and desktop control, intensifying competition in agentic coding tools.
• The Codex App Has Upended My Daily Workflow — The Codex app transforms coding into managing AI agents, enabling parallel work and sustained context through a desktop interface.
• OpenAI adds Codex Pets animated overlay to coding tool — Codex Pets enhances developer workflow by providing animated, real-time project status updates directly within the coding environment.
• OpenAI Codex App: death of the VSCode fork, multitasking worktrees, Skills Automations — Agent-native coding interfaces and specialized open models are rapidly advancing, shifting developer workflows and evaluation paradigms.
• OpenAI Boosts Codex's Core Functionality — OpenAI's Codex updates enhance desktop control and multi-agent capabilities, directly challenging Anthropic's offerings.

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Editorial summary, takeaway, and curation by AIssential. Original article published by KDnuggets.