TypeZone

A real-time 1v1 typing battle. Each player has a base and two modes:

• Gather: type ore words to mine gold. Clean streaks build a combo multiplier (up to 2.5x). Golden ore pays 3x but crumbles after 7 seconds. Luck can unlock diamond ore, which pays 5x and also lasts 7 seconds.
• Fight: type the words floating above incoming mobs to destroy them before they reach your base. Kills pay a bounty and charge your Lightning.

Spend gold to send mobs at your opponent or to cast spells:

Key	Item	Cost	Effect
1	Goblin	20	Fast, 1 short word; 3 charges, 4s recharge
2	Knight	45	Armored: 2 words; 2 charges, 8s recharge
3	Slime	35	Splits into 2 slimelets; 2 charges, 12s recharge
4	Giant	90	Slow, 3 long words, 25 damage; 1 charge, 20s recharge
5	Frost	40	Slow mobs attacking you by 60% for 6s; 15s cooldown from cast
6	Fog	45	Blur your opponent's words for 7s
8	Pickaxe	40→160	+25% gather gold (4 levels)
9	Luck	50 / 90 / 140	Golden chance 20% / 28% / 36%; level 3 adds 4% diamond chance
0	Drill Sergeant	60 / 100 / 150	Mob recharge time reduced by 15% / 30% / 45%

Mob charges start full and refill one at a time while below the cap. Drill Sergeant preserves existing recharge progress when upgraded. Shop buttons show charges, recharge progress, cooldowns, and upgrade levels.

Kills pay round(mob cost × 0.5 × defender combo multiplier × defender Pickaxe multiplier), including Lightning kills. Slimelets use a bounty cost of 6 gold and move at speed 72. The parent Slime pays its own cost-based bounty. While at least three mobs are heading toward your base, passive income increases by 50%, stacking with overtime. The HUD shows this pressure bonus.

Airdrops

A supply crate parachutes onto the battlefield 30 seconds in, then 35–45 seconds after each crate is claimed or lost. Both players race to type its word from Fight mode, and the first to finish wins it. A crate falls for 12 seconds; if nobody finishes, it's lost. The contents are hidden from everyone until the crate is won, and only the winner learns what was inside. The opponent sees only that you hold an item.

Items go into two Supplies slots. Press 7 (or click a slot) to use the oldest item. When both slots are full you can't race for crates.

Item	Effect
Heal	+20 base HP. Can't be used at full HP or in sudden death.

Other controls: Tab switches mode, Enter fires Lightning (strips a word off every incoming mob), Esc/Backspace drops your target. Typos reset your combo.

You can see your opponent's mode, gold and live typing progress on your mobs, so attack while they're busy mining. At 2:30 overtime starts: mobs keep speeding up and income doubles. At 5:00 sudden death crumbles both bases, healing is disabled and crates stop falling.

Running

npm install
npm start          # http://localhost:3000 (override with PORT=...)
npm test

Create a room and share the link or 4-letter code, or play Practice vs bot (easy / normal / hard).

New players can choose Learn by playing for a guided tutorial on the real battlefield. Short popovers point to each target, with an overlay that spotlights the active word or control. Mine two words, send a goblin, switch to defense, defeat an enemy, fire Lightning, and buy a Pickaxe. Each step waits for the required action. Enemies stop before your base, and there is no time limit. Finish by starting an easy bot match or returning to the lobby.

Layout

• server/game.js: authoritative match simulation; composes the systems below and validates commands
• server/match/: one system per mechanic: Player state, MatchClock phases, Mine (ores), Battlefield (mobs), AirdropSupply (crates), plus commands.js, the table mapping wire actions to Game commands
• server/tutorial.js: gates wire actions with the lesson policy and runs them on a Game built with tutorial collaborators (frozen clock, no crates, enemy hold line); a lesson script advances from each result
• server/bot.js: simulated typist for practice mode
• server/room.js: lobby, countdown, 20 Hz tick loop, rematch, forfeits
• server/index.js: static file server + WebSocket entry point
• shared/: tuning constants, the word list and the offer/item catalogs, used by both server and client
• public/: browser client; no build step. js/main.js wires the pieces: session.js (sequence, prediction and the drawn view, no DOM), feedback.js (frame events to sound, particles and alerts), connection.js (WebSocket), render.js (canvas), ui.js (DOM HUD), tutorial.js (lesson overlay)