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Start here: your first AI-built Roblox game

The playtest and fix loop

Every feature goes round this loop

ChangePlaytestRead outputFix cause

The faster you go round, the faster you build.

Let the AI run the loop

Paste this into your AI
Add a speed pad that doubles WalkSpeed for 3 seconds.
Then playtest: walk onto the pad, read the output, and report WalkSpeed before, during and after. Fix any errors.

Ask for the whole loop, not just the code.

Read an error in 3 seconds

ServerScriptService.Coins:14: attempt to index nil with 'Parent'

Which scriptWhich lineWhat went wrong

Line 14 expected an object and got nothing (nil). Paste the whole line to your AI, not “it’s broken”.

Fix the cause, not the symptom

Patch (hides the bug)

  • Wrap it in pcall
  • Add task.wait()
  • Add if x then everywhere

Fix (removes the bug)

  • Find why the call fails
  • Wait for the right thing (WaitForChild)
  • Find why x is missing
Paste this into your AI
Don't patch around this error. Explain the root cause first, then fix it where the bad value comes from. Playtest again to prove it.

Quick check

The AI says: "Fixed! I wrapped it in pcall." What now?