diff --git a/js/game.js b/js/game.js
index a9102d6..4a91077 100644
--- a/js/game.js
+++ b/js/game.js
@@ -22,9 +22,33 @@ const groundY = 420;
 const worldWidth = 13000;
 
 const DIFFICULTY = {
-  easy: { moveSpeed: 0.9, hazardSpeed: 0.85, pteroSpawn: 2.6, meteorSpawn: 1.9 },
-  medium: { moveSpeed: 1.0, hazardSpeed: 1.0, pteroSpawn: 2.2, meteorSpawn: 1.5 },
-  hard: { moveSpeed: 1.15, hazardSpeed: 1.25, pteroSpawn: 1.7, meteorSpawn: 1.2 }
+  easy: {
+    moveSpeed: 0.88,
+    hazardSpeed: 0.75,
+    pteroSpawn: 3.0,
+    meteorSpawn: 2.25,
+    hitCooldown: 1.35,
+    pteroUnlock: 140,
+    meteorUnlock: 340
+  },
+  medium: {
+    moveSpeed: 1.0,
+    hazardSpeed: 1.0,
+    pteroSpawn: 2.2,
+    meteorSpawn: 1.5,
+    hitCooldown: 1.0,
+    pteroUnlock: 100,
+    meteorUnlock: 250
+  },
+  hard: {
+    moveSpeed: 1.18,
+    hazardSpeed: 1.35,
+    pteroSpawn: 1.45,
+    meteorSpawn: 1.05,
+    hitCooldown: 0.7,
+    pteroUnlock: 70,
+    meteorUnlock: 170
+  }
 };
 
 const BIOMES = [
@@ -427,7 +451,7 @@ async function kill(reason) {
 function applyHit(reason) {
   if (state.hitCooldown > 0 || state.dead) return;
   state.hearts -= 1;
-  state.hitCooldown = 1;
+  state.hitCooldown = DIFFICULTY[gameConfig.difficulty].hitCooldown;
   playSfx('hit');
   if (state.hearts <= 0) kill(reason);
 }
@@ -531,7 +555,7 @@ function getPlayerHitboxForAirHazards(player) {
 }
 
 function updatePterodactyls(dt) {
-  if (state.score <= 100) return;
+  if (state.score <= DIFFICULTY[gameConfig.difficulty].pteroUnlock) return;
   state.pteroSpawnTimer -= dt;
 
   if (state.pteroSpawnTimer <= 0) {
@@ -552,7 +576,7 @@ function updatePterodactyls(dt) {
 }
 
 function updateMeteors(dt) {
-  if (state.score <= 250) return;
+  if (state.score <= DIFFICULTY[gameConfig.difficulty].meteorUnlock) return;
   state.meteorSpawnTimer -= dt;
 
   if (state.meteorSpawnTimer <= 0) {