your best time
PLATFORMER · REINFORCEMENT LEARNING
Jump Lab
Play 50 levels yourself, or train an AI on each one and watch it learn to sprint, wall jump and land. Then compare your best runs with everyone else's.
This browser blocks local storage here. Records and AI progress will be lost when the page is closed.
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Level Selection
All 50 levels are available. Every level has at least one tower that can only be climbed with wall jumps, and keeps its layout, its records and its own AI.
Random levelsgenerated from a seed · the same seed always gives the same level
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Easy 1
Easythe AI's best time
completions ÷ attempts
not trained yet
attempts by the AI
best single episode
How do you want to play?
👤 Manual PlayYou control the character.
🤖 AI TrainingThe agent learns this level by trial and error.
WORLD RECORDS
Leaderboards, replays and ghosts →
EASY 1
← → MOVESPACE JUMP · HOLD = HIGHERSHIFT SPRINTJUMP AT A WALL = WALL JUMP
SPACE PLAY / PAUSE← → STEP
exploringno random movesrestricted
starts with your first move
your best time
the time to beat
race starts with your first move
Hold Space longer for a higher jump, tap it for a short hop. Press jump again right as you land to bunny hop: every hop adds speed, running into a wall takes it away. Shift sprints for as long as you hold it, also in the air. In the air next to a wall, press Space again to kick off it. R restarts.
SIMULATION SPEED2×
NUMBER OF AI BOTS · ONE SHARED TABLE50
AI MODEL · THIS LEVELone row of action values per situation
AI PROGRESS · THIS LEVEL ONLYLoading…
TRAININGRunning
TRAINING STATISTICS · THIS LEVELUpdates live
completions ÷ attempts
0 completed · 0 failed
average —
50 bots
all runs, with exploration
runs without random moves
best episode —
ε 1.00
TRAINING HISTORY
mean reward recent success greedy success
episode 0waiting for first run
HOW THE AI MOVES · SUCCESSFUL RUNSno finished run yet
AI SPEED · PIXELS PER SECONDhorizontal speed, measured from the distance actually covered
all bots, over their current runs
best single bot, whole finished run
mean over all finished runs
momentum —
fastest single moment of any bot
no speed rule set
An agent's average speed is the distance it covered divided by the time it took. "Average agent speed" pools that over all bots that are running right now. "Fastest average agent" is the highest average a single bot reached over a complete, successful run, not a momentary peak. Running is 195 px/s, sprinting 312 px/s; bunny hopping raises that step by step up to 499 px/s.
NEURAL NETWORK · LIVE
Watch the network decide.
This level's AI uses the table model, which has no neurons to show. Switch the AI model to "Neural network" (in the controls above) to train and watch a real network here.
positive weight
negative weight
thicker and brighter = stronger
neuron off → strongly active
action it would pick
Drag to move, use − / + (or Ctrl + mouse wheel) to zoom, click a neuron to inspect it. All bots share this one network; "Bot #" chooses whose inputs flow through it. The picture is drawn from the network that is being trained, a few times per second.
AI-RESTRICTED AREAS · THIS LEVEL
Block parts of the level.
An agent that touches a restricted area fails its attempt, so the AI has to find a way around, over or under it.
RULES · THIS LEVEL
Default rules
Shape the agent's behavior.
Default system rules
Your rules
Rules take effect immediately and are saved with this level's AI. Other levels keep their own rules.
LEARNING PARAMETERS · THIS LEVEL
Tune how it learns.
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Leaderboards
Three separate rankings for every level. Each time was replayed and checked by the server, and every run can be watched or raced as a ghost.
"Watch" plays the run back exactly as it happened. "Race" starts the level with that run beside you as a ghost.
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Account
An account keeps your records, statistics and AI models on the server, so they follow you to other devices, and it puts your runs on the leaderboards.
Online features are off
LOGGED IN AS
—
Saved to your account: records, statistics, settings, your default rules and the AI model of every level you train. Your password is never stored on this device.
Personal bests
0 finished by the AI
all levels
all levels
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Settings
Autosave during AI trainingThe AI is also saved when you leave a level or close the page.
AI bots for a new AIHow many bots a level starts with (1 to 10,000). Each level remembers its own number afterwards.
Training threadsTraining can run on several processor cores next to the game.
Performance displayShows frame rate, training throughput, threads and memory during AI training.
Touch buttons in manual play"Automatic" shows them on touch screens only.
SAVED DATA
Stored in this browser.
Manual recordsDeletes your best times on all levels.
AI progressDeletes every level's AI with its statistics, rules, restricted areas and AI records.