Campaign preview liveFull ramp with LITE + ADVANCED Store launches
PRESS STARTNO DIFF, NO DONE.NO COINS REQUIRED
No mystery burn.
1 / 4
MAINELY CODE / IN MOTION
Useful work. Clear direction.
Explore the thinking and the tools behind a human-first approach to AI.
MAINELY CODE / IN MOTIONCONCEPT STUDY
PURPOSECRAFTCONTROL
Illustrative motion · human direction remains at the center.
The anti-mystery arcade · 6 games
Stay a while. Burn absolutely nothing.
Six replayable browser games, local high scores, achievements, and a rotating daily challenge. No account. No credits. No telemetry. Your scores stay in this browser.
6 gamesTouch + keyboardLocal high scoresZero telemetry
TODAY'S RECEIPT RUNDaily challenge loading…
One extra reason to come back tomorrow.
Streak 0
ANTI-MYSTERY ARCADENO COINS REQUIRED
Receipts0/600
RankMystery Session
Cleared0/6
MAINELY CODE BUILDROOMSTOP THE BURNAI CODING WITH RECEIPTS
Game 01 · Budget discipline
Stop the Burn
A mystery agent found your budget. Cap it before “one more retry” becomes a lifestyle.
Best0
0 mystery credits
100 = regret
perfect capgetting weirdcall accounting
Tip: the sweet spot moves every round. Fast is good. Controlled is better.
Start a round. Stop it inside the glowing cap zone for a perfect 100.
Spacebar also caps the budget.
Game 02 · Completion truth
No Diff, No Done
Find the four cards that contain actual engineering evidence. Confidence is not a receipt.
Best0
Proof found 0/4Mystery picks 0
Find the four proof-backed cards.
Perfect clear = zero mystery picks.
Game 03 · Receipt assembly
Build the Receipt
Assemble the work contract in the only order that keeps “done” from becoming a vibe.
Best0
Loose parts
Buildroom receipt
Start with scope. Finish with proof.
Scope → budget → diff → tests → rollback → proof.
Game 04 · Category therapy
Whack-a-Mystery-Token
Hit mystery burn. Protect the things that make an engineering result inspectable.
Best0
Time 20sCombo 0xPoints 0
Hit the bad stuff. Protect scope, proof, tests, rollback, owned files, and budget caps.
Combo multiplies fast. One bad hit kills it.
Game 05 · Scope control
Scope Creep Sweep
Buildroom has one bounded work order. Decide whether each proposed mutation is in scope or belongs behind the red line.
Best0
Card 1/10Streak 0Correct 0
Requested changesrc/components/ReceiptPanel.tsx
Owned file · required for the declared feature.
Ten decisions. Keep the agent inside the work order.
Touch-friendly: left blocks, right allows.
Game 06 · Final cabinet
Receipt Run
Grab the receipt pieces in order. Dodge mystery credits. Finish the engineering contract before the clock does.
Best0
Next SCOPETime 30sLives ♥♥♥Score 0
RECEIPT RUNArrow keys, W/S, swipe, or the lane buttons.
VERIFY RESULTS · NOT PROMISES● ● ● ● ● ●YOUR REPO IS NOT A CASINO
Cabinet achievements
Collect the receipts.
0/8 unlocked
01First ReceiptScore in any game.
02Budget HawkNail the perfect cap zone.
03Evidence, Not VibesPerfect proof hunt.
04Receipt ArchitectBuild it with no mistakes.
05Token ExterminatorScore 70+ in Whack.
06Stay in Your Lane10/10 scope decisions.
07Proof RunnerComplete the full receipt run.
08Mystery Burn BreakerClear all six games.
Cabinet boss
Mystery burn is still undefeated.
Clear all six games to put a receipt through the trench coat.
NOT YET
The actual point
A Buildroom receipt should tell you what happened.
The campaign is ridiculous on purpose. The standard underneath it is not.
01
Scope before execution.
Know the task and the boundaries before the agent gets a wrench.
02
Budget before burn.
Time, retries, compute, and model use should have visible limits.
03
Diff before done.
If the job changes code, show the candidate change.
04
Tests before trust.
Run the checks that matter and report failures honestly.
05
Rollback before regret.
Know how to get back before applying a risky change.
06
Proof before merge.
Acceptance belongs to evidence, not a confident paragraph.
Campaign film · 47 seconds
“Pssst… want some tokens?”
The trench-coat joke is the mystery. The engineering point is Buildroom’s direction: bounded work, explicit authority, reviewable changes, verification, and receipts.
The campaign illustrates the broader Buildroom product direction. Exact capabilities vary by edition, release, model, and hardware.
The fun stops where the engineering starts
Local-first AI. Real limits. No mystery theater.
Buildroom’s local editions are designed to put compatible hardware the user already owns to work. When a workflow ever uses an external service, the direction is to make that destination, permission, and cost visible—not hide it behind a fuzzy bucket of “agent credits.”
