diff --git a/src/audio/audioManager.js b/src/audio/audioManager.js
index 9733192..758df6e 100644
--- a/src/audio/audioManager.js
+++ b/src/audio/audioManager.js
@@ -1,6 +1,7 @@
 import sounds from "./sound.js";
 import music from "./music.js";
 import settings from "../data/settings.js";
+import { on } from "../core/gameEvents.js";
 
 let activeMusic = null;
 
@@ -37,8 +38,6 @@ export function playMusic(name) {
   activeMusic.loop = true;
 
   activeMusic.play().catch(() => {});
-
-  console.log("Music Playing!");
 }
 
 export function stopMusic() {
@@ -55,13 +54,13 @@ export function stopMusic() {
 
 let currentPhase = "low";
 
-export function updateGameplayMusic(heat) {
-  if (heat >= 2 && currentPhase === "low") {
+on("heatUp", (heat) => {
+  if (heat >= 4 && currentPhase === "low") {
     currentPhase = "high";
 
     playMusic("high");
   }
-}
+});
 
 export function isGameplayMusicPlaying() {
   return activeMusicName === "low" || activeMusicName === "high";
diff --git a/src/data/gameData.js b/src/data/gameData.js
index 61844f4..e7d89a4 100644
--- a/src/data/gameData.js
+++ b/src/data/gameData.js
@@ -1,49 +1,117 @@
-import {
-  resetGameplayMusic,
-  updateGameplayMusic,
-} from "../audio/audioManager.js";
-import { emit } from "../core/gameEvents.js";
+import { resetGameplayMusic } from "../audio/audioManager.js";
+import { on, emit } from "../core/gameEvents.js";
+import { getRandomRecipe } from "./items.js";
 
 const gameData = {
   essence: 0,
   heat: 1,
 };
 
-let heatListeners = [];
-function attachHeatListener(observer) {
-  if (heatListeners.includes(observer)) return false;
+const difficultyLevels = [
+  {
+    requiredEssence: 0,
+  },
+  {
+    requiredEssence: 100,
+  },
+  {
+    requiredEssence: 300,
+  },
+  {
+    requiredEssence: 600,
+  },
+  {
+    requiredEssence: 900,
+  },
+  {
+    requiredEssence: 1200,
+  },
+];
 
-  heatListeners.push(observer);
-  return true;
-}
-function detachHeatListener(observer) {
-  const index = heatListeners.indexOf(observer);
-  if (index === -1) return false;
+const dynamicDifficulty = {
+  scale: 1,
+  performance: 0,
+};
 
-  heatListeners.splice(index, 1);
-  return true;
-}
+let lastDelivery = performance.now();
+function adjustDynamicDifficulty(orderIndex, ratio) {
+  if (currentState.ordersFullfilled === 1) {
+    lastDelivery = performance.now();
+    activeOrders.splice(orderIndex, 1);
+    return;
+  }
+  const now = performance.now();
+  const sinceLastRatio =
+    (now - lastDelivery) /
+    (currentState.baseTime * currentState.timeToNextOrder);
+  lastDelivery = now;
+
+  let performanceDelta = 0;
+
+  // consistency
+  if (sinceLastRatio < 0.4) performanceDelta += 14;
+  else if (sinceLastRatio < 0.8) performanceDelta += 8;
+  else if (sinceLastRatio < 1.2) performanceDelta += 2;
+  else if (sinceLastRatio < 1.6) performanceDelta -= 5;
+  else performanceDelta -= 12;
+
+  // delivery quality
+  if (ratio > 0.7) performanceDelta += 10;
+  else if (ratio > 0.45) performanceDelta += 5;
+  else if (ratio > 0.3) performanceDelta += 0;
+  else if (ratio > 0.1) performanceDelta -= 6;
+  else performanceDelta -= 12;
+
+  if (activeOrders.length <= 2) performanceDelta *= 1.1;
+  else if (activeOrders.length <= 1) performanceDelta *= 1.2;
 
-function callHeatListeners() {
-  heatListeners.forEach((observer) => observer(gameData.heat));
+  dynamicDifficulty.performance *= 0.9;
+  dynamicDifficulty.performance += performanceDelta;
+  dynamicDifficulty.performance = Math.max(
+    -100,
+    Math.min(100, dynamicDifficulty.performance)
+  );
+  dynamicDifficulty.scale = 1 + dynamicDifficulty.performance * 0.0025;
+  dynamicDifficulty.scale = Math.max(
+    0.85,
+    Math.min(1.25, dynamicDifficulty.scale)
+  );
 }
 
 function increaseHeat() {
-  if (gameData.heat >= defaultState.maxHeat) return;
+  if (gameData.heat >= difficultyLevels.length) return;
   gameData.heat++;
-  updateGameplayMusic(gameData.heat);
-  callHeatListeners();
+  emit("heatUp", gameData.heat);
 }
 
 const activeOrders = [];
-function makeDelivery() {
-  gameData.essence += 25;
 
+on("delivered", (orderIndex) => {
   currentState.ordersFullfilled++;
-  if (currentState.ordersFullfilled >= currentState.nextHeat) {
-    increaseHeat();
+
+  const ratio =
+    activeOrders[orderIndex].timeRemaining / activeOrders[orderIndex].maxTime;
+  if (ratio >= 0.48) {
+    gameData.essence += 15 + Math.ceil(100 * ratio);
+  } else {
+    gameData.essence += 25 + Math.ceil(50 * ratio);
   }
-}
+
+  if (gameData.essence >= currentState.nextHeat) increaseHeat();
+
+  adjustDynamicDifficulty(orderIndex, ratio);
+  activeOrders.splice(orderIndex, 1);
+  for (const order of activeOrders) {
+    order.timeRemaining = Math.min(
+      order.maxTime,
+      order.timeRemaining + (ratio / 3) * order.maxTime
+    );
+  }
+
+  if (activeOrders.length === 0 && ratio > 0.6) {
+    addOrder(getRandomRecipe());
+  }
+});
 
 function addOrder(recipe) {
   if (activeOrders.length > 2) return;
@@ -51,18 +119,44 @@ function addOrder(recipe) {
   activeOrders.push({
     recipe: recipe.recipe,
     timeRemaining:
-      currentState.baseTime * defaultState.orderDurationRatio * recipe.count,
+      (currentState.baseTime * defaultState.orderDurationRatio * recipe.count) /
+      dynamicDifficulty.scale,
     maxTime:
-      currentState.baseTime * defaultState.orderDurationRatio * recipe.count,
+      (currentState.baseTime * defaultState.orderDurationRatio * recipe.count) /
+      dynamicDifficulty.scale,
   });
   emit("new_order");
+
+  currentState.timeToNextOrder =
+    (defaultState.orderAdditionRatio * currentState.baseTime) /
+    dynamicDifficulty.scale;
+}
+
+function progressOrders(timeStep) {
+  let timedOutPots = 0;
+  for (let i = activeOrders.length - 1; i >= 0; i--) {
+    const order = activeOrders[i];
+
+    order.timeRemaining -= timeStep;
+    if (order.timeRemaining <= 0) {
+      timedOutPots++;
+      dynamicDifficulty.performance -= 10;
+      activeOrders.splice(i, 1);
+    }
+  }
+
+  dynamicDifficulty.scale = 1 + dynamicDifficulty.performance * 0.0025;
+  dynamicDifficulty.scale = Math.max(
+    0.85,
+    Math.min(1.25, dynamicDifficulty.scale)
+  );
+  return timedOutPots;
 }
 
 const defaultState = Object.freeze({
-  baseTime: 15000, // in ms
-  maxHeat: 6,
-  orderAdditionRatio: 12,
-  orderDurationRatio: 6,
+  baseTime: 9000, // in ms
+  orderAdditionRatio: 10,
+  orderDurationRatio: 8,
   cookRatio: 3,
   stationRatio: 2 / 3,
 });
@@ -76,30 +170,33 @@ const currentState = {
 };
 
 function resetState() {
+  lastDelivery = performance.now();
+
   gameData.essence = 0;
   gameData.heat = 1;
+
   currentState.ordersFullfilled = 0;
-  resetGameplayMusic();
+  dynamicDifficulty.scale = 1;
+  dynamicDifficulty.performance = 0;
 
-  heatListeners.length = 0;
-  attachHeatListener((heatLevel) => {
-    currentState.nextHeat += heatLevel + 1;
-    currentState.baseTime = defaultState.baseTime / (2 + heatLevel);
-    currentState.timeToNextOrder =
-      defaultState.orderAdditionRatio * currentState.baseTime;
-  });
-  callHeatListeners();
+  resetGameplayMusic();
+  emit("heatUp", 1);
 }
 
+on("heatUp", (heatLevel) => {
+  currentState.nextHeat = difficultyLevels[heatLevel].requiredEssence;
+  currentState.baseTime = defaultState.baseTime / (1 + heatLevel * 0.55);
+  currentState.timeToNextOrder =
+    (defaultState.orderAdditionRatio * currentState.baseTime) /
+    dynamicDifficulty.scale;
+});
+
 export {
   gameData,
   activeOrders,
   addOrder,
-  makeDelivery,
+  progressOrders,
   defaultState,
   currentState,
   resetState,
-  attachHeatListener,
-  detachHeatListener,
-  increaseHeat,
 };
diff --git a/src/data/settings.js b/src/data/settings.js
index 2a279e9..77ae4c6 100644
--- a/src/data/settings.js
+++ b/src/data/settings.js
@@ -1,5 +1,5 @@
 const settings = {
-  musicVolume: 0.4,
+  musicVolume: 0.2,
   sfxVolume: 0.5,
 };
 
diff --git a/src/entities/station.js b/src/entities/station.js
index 568a0d3..b9e12fd 100644
--- a/src/entities/station.js
+++ b/src/entities/station.js
@@ -3,16 +3,9 @@ import {
   VARIATION_COUNT,
   BREW,
   OVERBREWED,
-  getRandomRecipe,
   hasRecipe,
 } from "../data/items.js";
-import {
-  gameData,
-  defaultState,
-  activeOrders,
-  addOrder,
-  makeDelivery,
-} from "../data/gameData.js";
+import { gameData, defaultState, activeOrders } from "../data/gameData.js";
 import { emit } from "../core/gameEvents.js";
 import { CUT } from "../data/items.js";
 
@@ -103,16 +96,10 @@ class DeliveryStation {
       );
 
       if (orderIndex !== -1) {
-        emit("delivered");
-        activeOrders.splice(orderIndex, 1);
-        makeDelivery();
+        emit("delivered", orderIndex);
       } else {
         gameData.essence++;
       }
-      if (activeOrders.length === 0) {
-        addOrder(getRandomRecipe());
-      }
-
       playerInv.glass = 0;
     };
 
diff --git a/src/logic/update.js b/src/logic/update.js
index b7b4c5f..1862a82 100644
--- a/src/logic/update.js
+++ b/src/logic/update.js
@@ -14,7 +14,7 @@ import { takePlace, work } from "./actions.js";
 import { GAME_STATES, setGameState } from "../core/gameState.js";
 import {
   activeOrders,
-  defaultState,
+  progressOrders,
   currentState,
   resetState,
   addOrder,
@@ -120,22 +120,6 @@ function calculatePosition(timeStep) {
   }
 }
 
-function progressOrders(timeStep) {
-  for (let i = activeOrders.length - 1; i >= 0; i--) {
-    const order = activeOrders[i];
-
-    order.timeRemaining -= timeStep;
-    if (order.timeRemaining <= 0) {
-      activeOrders.splice(i, 1);
-
-      player.lives--;
-      if (player.lives <= 0) {
-        setGameState(GAME_STATES.GAME_OVER);
-      }
-    }
-  }
-}
-
 function update(timeStep) {
   // UPDATE STATIONS
   for (let st of stations) {
@@ -143,12 +127,13 @@ function update(timeStep) {
   }
 
   // UPDATE ORDERS
-  progressOrders(timeStep);
+  player.lives -= progressOrders(timeStep);
+  if (player.lives <= 0) {
+    setGameState(GAME_STATES.GAME_OVER);
+  }
 
   currentState.timeToNextOrder -= timeStep;
   if (currentState.timeToNextOrder < 0) {
-    currentState.timeToNextOrder =
-      currentState.baseTime * defaultState.orderAdditionRatio;
     addOrder(getRandomRecipe());
   }
 
@@ -166,6 +151,10 @@ function update(timeStep) {
     if (justPressed["f"]) {
       const active = getActiveInteractable(stations);
       if (active) currentInteraction = work(active, currentState.baseTime);
+      if (currentInteraction) {
+        player.velocityX = 0;
+        player.velocityY = 0;
+      }
     }
   } else {
     if (!currentInteraction._work_lock) currentInteraction = null;