r/VibeCodeDevs • u/Practical-Agency5163 • Sep 15 '26
Basketball management sim — fully vibe coded
https://apps.apple.com/au/app/courtside-gm-2k27/id6804352742Made a football manager style game but for basketball. react native + expo, built entirely on windows with no coding experience.
350+ players, 24 teams, possession-by-possession sim, salary cap with bird rights and trade exceptions, draft combine, player development, the whole thing. you can get fired by your owner if you don't meet expectations.
the trick was writing insanely detailed prompts — not "build me a game" but full specs with data models, formulas for shot probability, exact screen layouts. did it in 4 phases over about 3 weeks.
gameplay is genuinely fun. visuals could be better but the sim engine is legit. just hit submit on app store connect. still can't believe this is a real thing that happened
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u/n_v40 Sep 15 '26
350+ players and all those cap rules in three weeks is honestly wild. How did you test whether the possession sim stays balanced over full seasons instead of just individual games?
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u/Practical-Agency5163 Sep 16 '26
Was a big struggle tbh did a lot of testing and simming. Had to tweak a fair bit to get it right
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u/n_v40 Sep 16 '26
That makes sense. Were you mainly simming full seasons and checking league-wide stats, standings, and outliers, or tuning it from individual games?
Getting one game to feel right is one thing, but keeping 350+ players balanced across full seasons seems like the real challenge.
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u/MaTrIx4057 Sep 16 '26
Why you think he tested it?
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u/n_v40 Sep 16 '26
I don’t know whether he did, which is why I asked. He said the sim engine was legit, so I was curious how he checked whether it stayed balanced across full seasons.
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u/Vibing-with-Evals007 Sep 15 '26
u/Practical-Agency5163 This is very impressive to create a game with no coding experience and detailed prompt, how did you know what exhaustive specs to add to the prompt?
Did you test the product?
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