I Built a Christmas Endless Runner Game Using Only AI (with Antigravity)

Hey devs 👋
I wanted to share a small but fun experiment I recently completed.

I built and published a Christmas-themed endless runner game for Android, and the interesting part is — almost everything was created using AI, with Antigravity as the core engine/workflow.

🎄 The Game

The game is a casual endless runner where you control Santa Claus running through a snowy winter world, dodging obstacles and collecting coins.

Think classic runner mechanics, but with a festive twist:

Lane switching, jumping, sliding

Increasing speed and difficulty

Coins, power-ups, and unlockable outfits

Fully family-friendly & non-violent

👉 Android link:

🤖 Why Antigravity?

I chose Antigravity because I wanted to explore how far an AI-first game workflow could go without:

Manual asset creation

Large art pipelines

Heavy custom tooling

With Antigravity, I was able to:

Rapidly prototype gameplay ideas

Generate and iterate on environments

Tune difficulty curves faster

Focus more on game feel rather than boilerplate

The biggest win was speed — ideas to playable builds happened much faster than my usual workflow.

🛠️ What Was AI-Driven

Here’s what AI + Antigravity handled well:

Environment generation & iteration

Gameplay balancing suggestions

Visual polish concepts

Store listing content (ASO, descriptions, screenshots text)

What still needed manual thinking:

Core game loop decisions

Difficulty pacing

Player experience & retention logic

AI didn’t replace development — it amplified it.

📈 Lessons Learned

A few takeaways from this experiment:

AI is amazing for iteration, not vision
You still need a clear idea of what you want to build.

Casual games benefit the most
Hyper-casual / runner games are perfect for AI-assisted workflows.

Shipping matters more than perfection
Publishing early helped me learn ASO, user behavior, and promotion faster.

🚀 What’s Next

I’m planning to:

Add more seasonal content

Improve retention with small updates

Experiment with AI-generated level variations

I’d love feedback from other devs:

Have you used Antigravity or AI-first workflows?

Where do you think AI helps most in game dev today?

Thanks for reading 🙌
Happy building 🎅🎄