Mock mode. No model calls are made: any upload maps to the trig sample and games come from recorded fixtures. See FIRST_RUN.md step 3 to go live.

Teaching-mechanic library

Every card is a concept-specific configuration of one mechanic family. Cards are data; families are engine code. A card is playable as soon as its family·mode is implemented.

Cards
316
Playable now
303
Flagships
13
Families
14
Modes
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10 cards

Particle Spread

playable

particle_spread · biology · simulator.predict

Concept: Diffusion

Player does: Predict how particles spread from the crowded chamber

Breaks: Particles move toward empty space on purpose

Particles move randomly and simply spread out net from high to low concentration; they have no destination in mind.

Membrane Balance

playable

membrane_balance · biology · simulator.predict

Concept: Osmosis

Player does: Predict which way water crosses and whether the cell swells or shrinks

Breaks: Salt crosses the membrane instead of water

In osmosis, water crosses the semipermeable membrane toward the higher solute concentration; the solute itself often cannot cross.

ATP Gate

playable

atp_gate · biology · simulator.intervene

Concept: Active transport

Player does: Spend ATP to pump ions against the gradient before the budget runs out

Breaks: Transport always goes down the gradient

Active transport uses ATP to move substances against their concentration gradient, unlike passive diffusion.

Dock Blocker

playable

dock_blocker · biology · simulator.predict

Concept: Competitive inhibition

Player does: Decoys occupy sites; predict how much more substrate restores the rate

Breaks: Inhibitors destroy enzymes

A competitive inhibitor blocks the active site reversibly; adding more substrate can outcompete it and restore the reaction rate.

Meiosis Shuffle

playable

meiosis_shuffle · biology · simulator.sample

Concept: Meiosis & variation

Player does: Shuffle homolog pairs; predict how many gamete types appear

Breaks: Meiosis makes identical cells

Meiosis shuffles homologous chromosomes to produce genetically varied gametes, not identical cells.

Survival Sim

playable

survival_sim · biology · simulator.predict

Concept: Natural selection

Player does: Change the environment; predict which trait spreads

Breaks: Individuals evolve because they need to

Natural selection acts on existing variation across a population over generations; individuals themselves do not evolve by need.

Drift Sim

playable

drift_sim · biology · simulator.sample

Concept: Genetic drift

Player does: Run tiny populations and watch alleles vanish by chance

Breaks: Evolution always improves fitness

Genetic drift changes allele frequencies by random chance, especially in small populations, regardless of fitness.

★ Feedback Controller

playable

feedback_controller · biology · simulator.intervene

Concept: Homeostasis

Player does: Release insulin or glucagon to keep glucose in the safe band

Breaks: Hormones switch on and stay on

Hormonal control in homeostasis is a continuous feedback loop, releasing and easing off as the level shifts, not an on/off switch.

Threshold Pulse

playable

threshold_pulse · biology · simulator.intervene

Concept: Action potentials

Player does: Stack inputs until threshold fires an all-or-none spike

Breaks: Stronger stimuli make bigger action potentials

An action potential is all-or-none once it fires; a stronger stimulus raises firing frequency, not the spike's size.

Vaccine Memory

playable

vaccine_memory · biology · simulator.predict

Concept: Immunological memory

Player does: Predict how fast the second infection is cleared

Breaks: Vaccines give you the disease

A vaccine trains memory cells to recognize a pathogen without causing the actual disease.

Family × genre adapters

Which socket each family mounts on in each genre (LIBRARY §5). The boss socket is always allowed. Hosts built tonight: dungeon, mystery, platformer.

FamilyDungeon crawler
boss: boss
Investigation adventure
boss: accusation
Side-view obstacle course
boss: boss
Grid puzzle / escape room
boss: boss
Management sim
boss: crisis
Truth Finder
chest / boss
Treasure chests; the one bearing the false claim is a mimic
cross_exam / accusation
One witness's claim contradicts the facts; object to the lie
gate / boss
Three doors; the one with the false claim collapses
tile_board / boss
Remove the odd tile to release the chain
event_card / crisis
Advisors' claims; the false one tanks a stat
Sequencer
door / boss
Glyph door pressed in process order
corkboard / accusation
Rebuild the timeline on the corkboard
gap / boss
Bridge planks in order; the wrong order leaves a gap
conveyor / boss
Order the parcels on the conveyor
research_node / crisis
Tech tree order
Tuner
door / boss
Vault rings, catapult, or alchemy dials spinning on the function
lab / accusation
Calibrate the instrument; set the lighthouse sweep
moving_platform / gate / boss
Saw wheels, launch pads, a balloon that only lifts when tuned
lock / beam_board / boss
Dial locks and gear trains
policy_dial / production_line / crisis
Machine settings on the production line
Mapper
altar / enemy / boss
Rune line on the altar floor, or an archery range on a number line
conversation / accusation
At the auction, bid the right magnitude; pin the map
gap / boss
The floor is a number line; land on the value
tile_board / boss
Place the tile at its position on the axis
market / crisis
Place goods on the price line
Sorter
enemy / boss
Type-matched weapons; category-keyed doors
evidence / accusation
File claims into case folders
gate / boss
Only matching-category platforms are solid
goal_pad / boss
Push crates onto category pads
market / crisis
Route goods to districts
Linker
enemy / boss
Chain lightning between pairs
corkboard / accusation
String the board
pickup / boss
Grapple anchors
pipe_board / boss
Flow-style pairing
research_node / crisis
Supply links
Investigator
door / boss
Rooms are hypotheses; clues seal their doors
accusation / corkboard
Pin clues, eliminate suspects, accuse
gate / boss
Clues seal the doors of eliminated hypotheses
tile_board / boss
Logic grid
event_card / crisis
Policy debate with evidence
Function World
altar / boss
Rune track whose floor height is f(x)
lab / accusation
Sensor readings converging on a timestamp
gap / boss
The terrain is y = f(x); the missing tile
tile_board / boss
Track tiles that follow f
market / crisis
Price curve over time
Balance
altar / boss
Alchemy scale; spilled atoms become slimes
archive / accusation
The ledger is off by one entry
switch / boss
Seesaw bridge
lock / boss
Cancel terms, DragonBox-style
ledger / crisis
Balance budgets and flows
Simulator
enemy / boss
Ecology rooms, reactor waves
lab / accusation
Keep the patient stable overnight
moving_platform / boss
Population or glucose lifts
beam_board / boss
Place species so all are fed
crisis / policy_dial
Run the economy or ecosystem
Builder
forge / boss
Craft a molecule, circuit, or golem program
lab / accusation
Build the compound or circuit
switch / boss
Wire the elevator; word-block bridge
tile_board / boss
Valence grid, Lightbot
production_line / crisis
Lay out the factory
Transformer
forge / boss
Crafting-bench machines
lab / accusation
Decode the letter or cipher
pickup / gate / boss
Power-up machine, cipher platforms
conveyor / pipe_board / boss
Route through machines
production_line / crisis
Processing chain
Accumulator
forge / boss
Fill the reservoir to forge the key
archive / accusation
Rebuild totals from rate logs
gap / boss
Fill the pit; velocity ghost
conveyor / boss
Fill tanks
production_line / crisis
Output over time
Recall
enemy / boss
Spells are flashcards, cooldowns are spacing
conversation / accusation
Riddle-keeper interrogation
pickup / boss
Type the term to double-jump
tile_board / boss
Timed word tiles
research_node / crisis
Quick recall boosts research