Gemini 3 Making Games? Full Experience & Tutorial Guide

Hello everyone! This is KO from FilterGame = w = /

Yesterday, Google officially launched Gemini 3,
a major upgrade in reasoning, logic, and coding capability.
So the big question is—
How good is Gemini 3 at making games?

In this article, I’ll show you the two games I made with Gemini 3,
and at the end you’ll find prompt templates you can copy to generate your own games instantly.

1. Gemini 3 Fighting Game Demo

👉 Play directly in your browser:
https://gemini-fight-game.pages.dev/

Controls:

• WASD: Move
• J / K: Punch / Kick
• U: Hadouken
• I: Shoryuken
  
  

Gemini 3 understands states, hit detection, key mapping,
and produces surprisingly structured fighting-game logic.

2. Side-Scrolling Action Fighting (Little Fighter-like)

👉 Also playable in browser:
https://gemini-fight-game2.pages.dev/

Features include:

• Keyboard-only action
• Auto-generated UI, effects, animations
• Stick-figure fighters with full hit-state logic

The feel is similar to Little Fighter 2, and shockingly complete for an AI-generated prototype.

◆ Real Impressions: Gemini 3 for Game Development

From these two demos, it’s clear that Gemini 3 is far better at:

• Game logic
• Rendering and UI structure
• State machines
• Action flow

This time I used p5.js + HTML, and the generation was extremely fast—
often under 3 exchanges to get a playable prototype.

● How to Use Gemini 3 (GUI Mode)

Method 1: Official Gemini site

https://gemini.google.com/app?hl=zh-TW
Choose the “Thinking” mode.

Method 2: Google AI Studio

https://aistudio.google.com/
Top-right → Gemini 3 Pro Preview

Both methods work equally well.

◆ Complete Prompt I Used (Copy This!)

Here’s the exact prompt I used.
You can reuse it or change words like “shooting,” “tower defense,” “platformer,” etc.

【
Make a 2D side-scrolling street fighting game using web + p5.js.
Output code I can copy-paste to play immediately.
Game style similar to Little Fighter 2.
Keyboard controls, with a visual key panel at the bottom that lights up when pressed.
Include 3 default fighters to select from; after selection, enter a right-scrolling stage mode.
Spawn enemies and allies, clearly marked.
Use 6-head-tall stick figures with proper limb movement.
Use a state machine to manage all animations.
Each attack/move must have unique animation.
Include sample effects.
UI text in Chinese.
Make the content as rich as possible.
】

Prompt Structure Breakdown

• Framework: p5.js / Web
• Input system: Keyboard + visual keys
• Character spec: Stick figures + state machine
• Gameplay: Multiple fighters, stage mode, enemies/allies
• Presentation: Effects, animation detail, UI language

Swap these elements to make any genre prototype.

◆ How AI Will Change Game Development

We can expect huge boosts in:

• Prototyping speed
• Testing game logic
• Creating animation drafts
• Rapid iteration

The loop from idea → playable test is becoming dramatically faster.

“Making small games for yourself using AI”
might even become a new kind of hobby.

That’s it for today—
go try Gemini 3 and make your own mini game!

Lastly, I’d like to share the Steam game I’m currently working on,
AirBoost: Airship Knight!
You can try the demo now, and I’d be very happy if you’d add it to your wishlist!