How to Build a Simple Game with AI Tools in Just 3 Days

Building a game can feel like an overwhelming task, especially for beginners. With so many moving parts—from graphics and sound to coding and testing—it's easy to get lost in the weeds. But what if I told you that with the right AI tools, you could create a simple game in just three days? In 2026, advancements in AI have made it easier than ever for indie hackers and side project builders to dive into game development without needing a PhD in computer science. Let's break down how you can do this step-by-step.

Prerequisites: What You Need to Get Started

Before diving in, make sure you have the following:

• A computer: Windows or Mac works fine.
• Basic coding knowledge: Familiarity with JavaScript or Python will be helpful.
• Accounts: Sign up for the tools listed below.
• Time: Allocate about 3 days (roughly 12-15 hours total).

Day 1: Planning Your Game Concept

Define Your Game Idea

Start by jotting down your game concept. What genre will it be? A simple platformer? A puzzle game? Define the core mechanics and the objective.

Use AI for Game Design Ideas

• Tool: ChatGPT
  • What it does: Generates game ideas, mechanics, and narratives.
  • Pricing: Free tier available; Pro version at $20/month.
  • Best for: Brainstorming game concepts and storylines.
  • Limitations: Ideas may need significant refinement.
  • Our take: We often use ChatGPT to bounce off ideas, but we refine them ourselves.

Create a Game Design Document (GDD)

Draft a GDD to outline your game’s mechanics, characters, and story. This document will help you stay focused during development.

Day 2: Building the Game

Choose Your Game Engine

For beginners, I recommend using Unity or Godot. Both have strong communities and plenty of resources.

• Tool Comparison Table: Game Engines

| Tool | Pricing | Best for | Limitations | Our Verdict | |--------|--------------------------|------------------|----------------------------------|---------------------------------| | Unity | Free + $40/mo for Pro | 2D/3D games | Steeper learning curve | Great for polished games, but complex for beginners. | | Godot | Free | 2D games | Fewer resources than Unity | Easier for quick prototypes. |

Use AI Tools for Asset Creation

• Tool: DeepAI
  • What it does: Generates game assets (sprites, backgrounds).
  • Pricing: Free tier; Pro at $15/month.
  • Best for: Quick asset generation.
  • Limitations: Output may require manual editing.
  • Our take: We use DeepAI for placeholder assets while developing.

Implement Game Logic with AI Assistance

• Tool: OpenAI Codex
  • What it does: Assists with code generation and debugging.
  • Pricing: $20/month.
  • Best for: Writing scripts and solving coding issues.
  • Limitations: Can produce incorrect code; needs oversight.
  • Our take: Codex saves us time, but we always double-check its output.

Day 3: Testing and Polishing

Playtest Your Game

Gather friends or fellow indie hackers to playtest your game. Take notes on what works and what doesn’t.

Use AI for Feedback Analysis

• Tool: UserTesting
  • What it does: Gathers user feedback through recorded sessions.
  • Pricing: Starts at $49/month.
  • Best for: Understanding player experience.
  • Limitations: Can get pricey for small projects.
  • Our take: We find UserTesting valuable for insights, but it can add up.

Troubleshooting Common Issues

• What Could Go Wrong: Bugs in the game logic or assets not loading.
• Solutions: Use Codex for debugging and check asset paths.

What’s Next?

Once your game is built, consider releasing it on platforms like itch.io or Steam. You can also gather feedback and iterate on your design.

What We Actually Use

For our game projects, we typically rely on Unity for development, DeepAI for asset creation, and Codex for coding assistance. These tools together create a seamless workflow that helps us ship faster.

Conclusion: Start Here

If you’re ready to dive into game development, start with a simple concept and use AI tools to streamline your process. Remember to keep your expectations realistic and focus on learning as you go. With the right approach, you can build a simple game in just three days.