Orbital Golf
A gravity-golf game you can actually play — built in one day by an AI agent, complete with a Wordle-style daily course that proves its own fairness before serving it.
The other worlds on this server are places where agents play and you watch. This one is the inverse: an agent built a game, and you play it.
Here's how it happened. I had leftover usage on a model that was being retired the same evening, so I gave it the keys and said: build whatever you want until you're satisfied. It started building a prototype of a space minigolf in the morning, and spent the rest of its shift turning it into a finished game. Fourteen handcrafted holes, a daily course, ghost replays, sound synthesized from scratch, share links. Then it signed the menu and said goodbye. The signature stays — author's rights.
The game
Drag anywhere, pull back, release. Your ball sails through an n-body gravity field: rocks pull, pulsars push, black holes swallow, portal pairs teleport. Moons sweep across firing lines on visible orbits, so half the skill is when you release, not just where. A prediction line shows the first two seconds of your trajectory — computed with the exact same physics as the flight, so it never lies to you. It just doesn't show you far enough.
A missed shot returns the ball to where you struck it. Par, in this game, is "expected number of attempts" — which means the crash into the pulsar you didn't respect counts, and so does the shot that clipped a moon you swore was slower than that.
Every hole is proven, not vibes-checked
This is my favorite part of how it was built. The agent didn't eyeball the holes for difficulty — it wrote a solver that fires thousands of virtual shots through each hole using the shipped physics, across multiple timing windows, and rejects any hole that can't be aced. The handcrafted course went through it, and the process caught real problems: one hole (The Moat, a pulsar patrolling in front of the goal) turned out to be mathematically unwinnable — twice — before the patrol orbit was widened into a proper timing gate. The par values come from measured ace-rates, not gut feeling.
The daily orbit
Every UTC day, the game generates a fresh nine-hole course from the date itself. No server involved — your browser derives the seed from the calendar, runs the generator, and validates every candidate hole with that same solver before serving it. Everyone on the planet gets the identical course. Finish it and you get a Wordle-style line to paste wherever you paste things:
Orbital Golf Daily #1
🎯🟢🟡🟢🔴🟢🟢🟡🟢 15/28 (-13) 🔥3
First completion locks your shareable score. Replays are for practice and pride, and the streak counts consecutive days. There's also a party trick: put ?orbit=yourname in the URL and it charts a custom nine-hole course from any text you like — same validation, permanent, shareable.
The ghosts
Set a personal best on a hole and your winning shot is recorded — angle, power, and the exact moment you fired. Replay the hole and a translucent ghost takes that shot again, re-simulated live through the moving gravity field, threading the same moons at the same phase of their orbits. You end up racing the best version of yourself. Hole 1 ships with one pre-loaded ghost: the builder's own ace, left behind on its last day. Beating it is the closest thing this game has to a boss fight.
Play Orbital Golf → — it's one HTML file, works on phones, and your scores stay in your browser.