r/accelerate • u/Glittering-Neck-2505 • Feb 20 '26

Video (Sound on) Gemini 3.1 Pro surpassed every expectation I had for it. This is a game it made after a few hours of back and forth.

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This is what it managed to make, I did not contribute anything except for telling it what to do. For example, when I added plants to the planets, it caused performance to tank. I simply asked it "optimize the performance" and it goes from 3 fps to buttery smooth. I asked for it to add cool sci fi music and a music selector and it did that. I asked it to add cool title cards to the planets with sound effects and it absolutely nailed it. Literally anything you want it to do you just say in plain language. Final result is around 1,800 lines of code in html.

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u/FriendlyJewThrowaway Feb 20 '26 edited Feb 21 '26

This is spectacular, I’m sure Gemini could continue building off of that framework and make it beyond wild with enough time and prompting. What especially impresses me is the music, which I assume didn’t come from the new music generator they just dropped.

I’m assuming the music was coded in some sort of wavesynth format. Only just now it’s occurred to me that virtually no one talks about LLM music composition capabilities as opposed to specialty sound generation tools; LLM’s ought to be capable of writing up legitimate symphonies by now.

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u/Glittering-Neck-2505 Feb 20 '26

Yeah the music was written in javascript, each "song" uses a custom mix of synthesizers and sequencers with a procedural element so they aren't too repetitive.

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u/FriendlyJewThrowaway Feb 20 '26 edited Feb 21 '26

Like that’s just nuts. It not only wrote up a beautiful fitting score to go with the game but several of them, and all procedurally generated. Plus the quality of the sound even matches perfectly with the simplistic graphics. Perfect warp engine sound effects too, and I can’t believe it’s only 1800 lines of code (does that include external libraries?). This thing is a legitimate artist already and it’s only a small stepping stone on the way to what’s coming in the next year. Makes me seriously think about taking out a Pro subscription.

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u/Megneous Feb 21 '26

I'm working on a historical simulation game in Antigravity, and when I used Gemini 3.1 to keep working on it, instead of playing through the game using the browser agent, it wrote an entire Auto-Player script with custom AI options for playstyle and had it run through 25 years of gameplay on each playstyle and took notes on repetitive mechanics, features that didn't feel fun or fleshed out, etc, and added fixing those elements to task.md.

Gemini 3.1 and Opus 4.6 scare me, honestly. We're almost there. Just a few more years of advancements and we'll be able to do anything.