Echo
Watch the pads light up, then play the sequence back. It gets one note longer every round.
Press Start, then watch closely.
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Play · Understand · Build
Play first. Figure out how it works after.
Every game here is a lesson in disguise: you play it, you notice how it works, and that understanding is the skill underneath — whether it is AI, physics, or pure logic. Twenty-two free games — no sign-up, no downloads, works on your phone.
AI Skills
How AI really works, as games.
Four new games on the skills that matter right now — writing better prompts, checking AI's answers, directing AI agents, fixing AI-built code — plus Tetris AI, where a simple algorithm shows you how search heuristics think.
Prompt Repair
Repair broken AI prompts by picking the right improvement pieces — goal, context, constraints, output format.
What it teachesPrompt engineering: why specific goals, real context, and hard constraints turn vague asks into useful answers.
Play Prompt RepairHallucination Hunt
An AI gives you confident answers. You get evidence cards. Flag every claim that nothing supports.
What it teachesVerifying AI output: never trust a claim without a source — even when it sounds right.
Play Hallucination HuntAgent Mission
An AI agent has a goal and a toolbox full of tools. Pick the right tools, in the right order, to complete the mission.
What it teachesHow agents work: the loop of goal → plan → tool → result sitting behind every AI assistant.
Play Agent MissionDebug the Build
AI-built code breaks — and the fix isn't starting over. Choose the best next prompt to get it working again.
What it teachesWorking with coding AI: how to feed it error messages, context, and constraints so it actually fixes things.
Play Debug the BuildTetris AI
The classic falling-block puzzle, with a simple AI playing alongside you — watch how it scores every board and picks a move.
What it teachesSearch heuristics: how a small algorithm evaluates board states and chooses actions without learning anything.
Play Tetris AILogic & Systems
No AI, no luck — just reasoning.
Parking Panic is a pure planning puzzle: read the constraints, think a few moves ahead, and escape in as few moves as possible.
Science & Simulation
Toy models of the real world.
Deliberately simplified models, so the idea comes through: tune a rocket’s payload, fuel, and thrust until it reaches its target altitude — or read the water and outsmart the fish.
Rocket Launch
Your rocket is built. Balance payload, fuel, and thrust — and find the combination that hits its target altitude.
What it teachesTradeoffs + optimization — every kilogram costs fuel, and every drop of fuel needs thrust. A simplified model, not a real flight simulator.
Play Rocket LaunchRocket Car
Boost, jump, and flip a rocket-powered stunt car — from the test facility to free roam on Mars.
What it teachesThrust + trajectory — aim the nozzles, manage boost, and stick the landing. A toy model, not a real flight simulator.
Play Rocket CarFishing Logic
Read the water, pick your lure, and predict the catch. Change one variable at a time and watch what actually matters.
What it teachesProbability + variables — testing one change at a time to find what drives the outcome. A simplified model, not real ecology.
Play Fishing LogicEngineering & Systems
Build it. Run it. Let the system decide.
Ten simulation games with fifteen levels each. No quizzes: build or tune the system, run the animated test, then learn from what actually happened.
Bridge Builder
Build a load-bearing structure, then send traffic across it and watch every member react.
What it teachesStructures · tension · compression
Play Bridge BuilderSpeed Lab
Change gearing, grip, power, weight and aero — then measure what actually makes a car faster.
What it teachesVehicle dynamics · optimization
Play Speed LabDrag Racing Garage
Tune real-world cars, stage at the tree, control the launch and hit every shift.
What it teachesTraction · gearing · reaction
Play Drag Racing GarageCrane Operator
Choose boom geometry, counterweight and outriggers, then make the lift without tipping.
What it teachesLeverage · stability · load moment
Play Crane OperatorTower Engineer
Build the load path and keep your tower standing through gravity, wind and earthquakes.
What it teachesLoad paths · stiffness · drift
Play Tower EngineerPower Grid
Connect generation, storage and a changing city without overloading the network.
What it teachesCapacity · redundancy · peak demand
Play Power GridFactory Flow
Build a production line, watch queues form, and eliminate the real bottleneck.
What it teachesThroughput · queues · bottlenecks
Play Factory FlowRail Yard
Route moving trains through switches and shared blocks without collisions or excessive delay.
What it teachesRouting · scheduling · conflicts
Play Rail YardWaterworks
Design pipes, pumps and storage so every building receives usable pressure.
What it teachesFlow · pressure · elevation
Play WaterworksDeep Space
Pilot a ship, mine asteroids and fight pirates across 15 escalating sectors.
What it teachesFlight · upgrades · resource strategy
Play Deep SpaceArcade
Pure fun — that teaches anyway.
Chip Run is here for the love of the game: dodging faults across a live logic board. Echo, Mind Reader, and Quick Draw play right here on this page — two minutes each. It all just happens to hide real lessons in the adrenaline.
Chip Run
Guide Pip across a live logic board, dodging faults and grabbing power cells before the trace runs out.
What it teachesThe game loop and collision detection — the requestAnimationFrame heartbeat running under every browser animation.
Play Chip RunEcho
Pip lights up a sequence of chips, then you repeat it back. Longer streaks, faster flashes, no mercy.
What it teachesWorking memory — why your brain holds about seven items at a time, and how repetition stretches it.
Play belowMind Reader
Think of a number and answer yes-or-no. Pip guesses it every time — you will not fool it.
What it teachesBinary search: halving a search space turns a hundred guesses into seven.
Play belowQuick Draw
Tap the instant Pip signals. Your reaction time, measured in milliseconds, ranked against the lab average.
What it teachesLatency — the same round-trip math behind network pings, frame budgets, and response times.
Play below
Built with plain web tech. Every game runs on the same open stack as the rest of the lab — HTML, canvas, and vanilla JavaScript. No frameworks, no third-party trackers, no fake scores. Your best scores stay in your own browser.
Play right here
Three quick games, zero loading.
Echo, Mind Reader, and Quick Draw run entirely in this page — no downloads, no accounts. Your best scores stay in your own browser.
Mind Reader
Think of a number between 1 and 100. Pip will find it in seven guesses or fewer.
?
pick a number to begin
GUESSES 0
Quick Draw
Wait for yellow… then click as fast as humanly possible. Click too soon and you start over.
Click to armthen wait for yellow
LAST Not playedBEST Not playedTRIES 0