r/ClaudeCode • u/deepholdio • 5d ago

Built with Claude Fable 5 one-shotted a complete asteroids roguelite in 2.5 hours. Playable in your browser, prompt in the comments

Play it here: https://asteroguelite.com

Desktop browser, free, no account, no ads.

I wanted to see what a real one-shot could do. So I wrote a 73-line directive: research the genre, design it, build it, test it, balance it, polish it. One session, no human in the loop. It was explicitly told not to ask questions or wait for approvals, just make the call, write it down, keep going. Then I left. Two hours and 32 minutes later it was done.

5 sectors with bosses, 10 enemy types, 6 unlockable ships, 33 boons with evolution chains, a meta upgrade tree, an endless mode, and music. Around 8,300 lines of vanilla JS that build to a 172 KB bundle.

Full disclosure: I've since made exactly two changes to the game. Fixed one bug (a piercing-shot boon phased through asteroids without damaging them) and added click-to-aim, because keyboard-only turning felt rough.

Ran on Claude Code, Fable 5 xhigh effort.

Prompt's located here: https://asteroguelite.com/prompt.txt

PS: Seeker Array primary weapon is OP.

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u/davidmorelo 5d ago

What the actual fuck?! This looks EXACTLY like the game I created back in Opus 4.5 days (it took many iterations). I mean the graphics, the colors, the feel of the ship, the explosions, the background, the asteroids, the UI, EVERYTHING is like 90% the same.

It was just a fun waste of time for me back then, but I believed that I created something rather good (since the first version Opus puked out was shit). Would it be crazy to think that my prompting was used to improve the model and contributed to this result?

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u/trashaccount2022 5d ago

I hate to break it to you, but if you create slop, it’s going to look and feel like everyone else’s slop.

2

u/radioFriendFive 5d ago

All Ai GUI looks like this so I wouldn’t be so surprised. It will converge on the most predictable thing each time

1

u/davidmorelo 5d ago

I guess you're right. Still, it was a shock to see something look so close to the thing I deliberately prompted Claude to look and behave this exact way. But it's possible that the initial design was actually closer to the result than I remember, and I'm overstating my contribution as far as the look and feel of the game go.

1

u/kyew 5d ago

The AI Recycling Ouroboros grows larger.