You can learn how to make an HTML5 game with AI in an afternoon, using no game engine, no downloads, and no prior programming experience. We know because we do it daily — every game on this site starts as a text prompt in an AI chat. This guide walks through the exact seven steps we use, including what to paste, what to expect, and where things usually go wrong.
What You Need Before You Start
Three things, honestly:
- An AI tool. Claude produces the most complete single-file first drafts in our experience; ChatGPT and Gemini work too.
- A browser. To test your game. Any modern one will do — HTML5 runs everywhere.
- A text editor. Notepad or TextEdit is enough, since you are mostly saving and opening files.
That is the whole list. No Unity, no Godot, no build pipeline. The game you make will be a single .html file.
How to Make an HTML5 Game With AI, Step by Step
Step 1: Choose a Small, Specific Game
“Make me a game” fails. “Make a vertical platformer where you jump upward on disappearing platforms” succeeds. Specific beats ambitious every time — one mechanic, one screen, one lose condition. Good first projects: a jumper (like Pixel Jump, our vertical platformer), a tapper (like Star Tapper), a dodger, or a breakout clone.
Step 2: Write a Prompt That Sets Constraints
This is the step that decides everything, so spend real effort here. Paste something like this into your AI chat:
Build a complete HTML5 game as a single self-contained HTML file. Game: [your idea]. Use canvas for rendering, plain JavaScript, no external libraries or assets. Requirements: keyboard controls (arrow keys or space), touch controls for mobile, a visible score, a game-over state with a restart button, difficulty that ramps up gradually, and a dark background with high-contrast colors. The game must be playable immediately when the file is opened in a browser.
Those constraints — single file, no libraries, both control schemes, restart button — are what separate a game from a demo. For platformers specifically, our platformer physics prompt adds the jump-feel details models tend to miss.
Step 3: Generate and Save the File
Expect a full block of code. Copy it, paste it into your text editor, and save it as mygame.html — plain text, not rich text. Then double-click the file. It opens in your browser and, if all went well, runs. If your tool offers a file download or an artifact preview, use that instead.
Step 4: Play It Before You Change Anything
Resist fixing anything until you have played five full sessions. Take actual notes: “jump feels floaty,” “score overlaps the player,” “no way to restart without refreshing.” A playtest list turns you from a wisher into a director.
Step 5: Report Bugs Like a Playtester
Go back to the same chat and report problems precisely. Not “the jumping is bad” but “jump velocity feels too low; the character takes too long to leave the ground.” The model cannot see your screen — every fix depends on your description. Expect two or three rounds of this. That is normal, not failure.
Step 5 and a half: keep every version. Before each fix round, save a copy of the current file. AI edits occasionally break working code, and v3-working.html is the cheapest insurance in game development.
Step 6: Add Polish and Difficulty Tuning
Now make it feel good. Two prompts handle most of this. A game juice pass — screen shake on hits, particle bursts, easing on animations — comes from our game juice polish prompt. A difficulty pass — when does it speed up, how fast, does it ever get unfair — comes from the difficulty tuning prompt. Polish is the difference between “runs” and “fun,” and it is mostly these small effects.
Step 7: Publish and Share
The file itself is the game — share it however you like. For a proper public home, our guide to how to publish an AI game online covers free hosting options including Cloudflare Pages and itch.io. Once your game grows beyond one file or you want version control, move the project into Cursor and iterate there like a pro.
Common Failures (and Their Fixes)
The file is blank or half-renders. The chat cut the code off mid-output. Reply “continue from the last line” or “output the complete file again without stopping.”
It works on desktop, ignores taps on mobile. The prompt omitted touch controls. Ask for touch handlers explicitly, and check our mobile touch controls prompt for the phrasing that works.
Each fix breaks something else. Stop iterating in one endless chat. Start a fresh conversation, paste in the current working file, and request one change at a time.
It looks like a spreadsheet from 1997. Ask for a cohesive visual theme — palette, glow effects, consistent fonts. Models deliver style when asked for style.
That is the whole method: one specific idea, one well-constrained prompt, then honest playtesting. Make your first game bad and your third game good — that is the standard trajectory, and it is faster than any of the old ones.
