🏂❄️ Ski Jump Simulator 🏂❄️ This was my first real wow moment with the new Codex app + skills + codex-5.3. I was able to ship a playable, physics-based sim even though I’ve never built a game before! 🧵on tips / lessons learned ski-jump-sim.vercel.app

Skills were the difference-maker. 🎮 Three.js skills: github.com/CloudAI-X/thre… 👀 Playwright skill to visually screenshot the game, verify changes, and iterate 📸 image-gen skill for sprite sheets, textures, and backgrounds. I was shocked at how well this worked!

One workflow tip: I started in ChatGPT first (Pro), not inside Codex. I asked it to produce a plan for an advanced AI coding agent. Also, I specifically asked to download it as a markdown file, and it went way deeper than a normal inline response. Pro is a beast of a model!

Also in ChatGPT I asked for supplemental research using web search to get Olympic-standard ski jump details (hill dimensions, typical speeds, timings) and a detailed physics breakdown: mass, drag, wind, lift, etc.. It really helped to capture a realistic-feeling jump.

This definitely was not a "one-shot" result! I spent 3-4 hours total tweaking details and getting the look/feel right. I wasted tokens on the Playwright loop trying to auto-fix the Three.js code. Sometimes it wouldn’t notice the obvious issue, or it would “fix” the wrong thing.

What worked better was asking: “Where in the code are the variables controlling X?” Then I’d hand-tweak those values and move on. Next time I'll build a little debug panel next to the game w/ sliders for key constants with live refresh. That would make asset placement way faster

But overall, it was very fun to build a full working game end-to-end and Codex is surprisingly good at making games. Give it a shot! My high score is 112. If you beat it, reply with a screenshot 😄 ski-jump-sim.vercel.app

p.s. I have to shout-out my inspiration for this game. 1985's classic "Winter Games" for the Commodore 64! So many hours trying to time it juuuust right to hit that red flag!

@kleneway omg I was wondering if that's where this was from! I loved that game

@bfioca That and Summer Games were pretty incredible. Best C64 games by a mile