diff --git a/js/game.js b/js/game.js
index ad8f6c0..bdd9ba4 100644
--- a/js/game.js
+++ b/js/game.js
@@ -63,6 +63,15 @@ function createInitialState() {
 let state = createInitialState();
 let saveEligible = false;
 let scoreSavedThisRun = false;
+let saveInFlight = false;
+
+const saveScoreBtnEl = saveScoreFormEl.querySelector('button[type="submit"]');
+
+function setSaveFormBusy(isBusy) {
+  saveInFlight = isBusy;
+  playerNameEl.disabled = isBusy;
+  if (saveScoreBtnEl) saveScoreBtnEl.disabled = isBusy;
+}
 
 window.addEventListener('keydown', (e) => {
   if (["ArrowUp", "ArrowDown", "ArrowLeft", "ArrowRight"].includes(e.key)) e.preventDefault();
@@ -81,23 +90,33 @@ restartBtnEl.addEventListener('click', () => {
   saveScoreFormEl.classList.add('hidden');
   saveEligible = false;
   scoreSavedThisRun = false;
+  setSaveFormBusy(false);
 });
 
 saveScoreFormEl.addEventListener('submit', async (e) => {
   e.preventDefault();
-  if (!saveEligible) return;
+  if (!saveEligible || saveInFlight || scoreSavedThisRun) return;
   const name = playerNameEl.value.trim() || 'Anonymous';
 
-  await fetch('api/scores.php', {
-    method: 'POST',
-    headers: { 'Content-Type': 'application/json' },
-    body: JSON.stringify({ name, score: state.score })
-  });
+  setSaveFormBusy(true);
+  try {
+    const res = await fetch('api/scores.php', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ name, score: state.score })
+    });
 
-  saveEligible = false;
-  scoreSavedThisRun = true;
-  saveScoreFormEl.classList.add('hidden');
-  await populateLeaderboard();
+    if (!res.ok) throw new Error('Score save failed');
+
+    saveEligible = false;
+    scoreSavedThisRun = true;
+    saveScoreFormEl.classList.add('hidden');
+    await populateLeaderboard();
+  } catch (err) {
+    console.error(err);
+  } finally {
+    setSaveFormBusy(false);
+  }
 });
 
 function drawBackground() {
@@ -177,7 +196,7 @@ async function populateLeaderboard() {
   });
 
   const qualifies = scores.length < 10 || state.score > (scores[scores.length - 1]?.score ?? -1);
-  saveEligible = qualifies && !scoreSavedThisRun;
+  saveEligible = qualifies && !scoreSavedThisRun && !saveInFlight;
   saveScoreFormEl.classList.toggle('hidden', !saveEligible);
 }
 
@@ -234,10 +253,23 @@ const PTERODACTYL_LANES = [
 
 function getPterodactylHitbox(flyer) {
   return {
-    x: flyer.x + 6,
-    y: flyer.y + 5,
-    width: flyer.width - 12,
-    height: flyer.height - 10
+    x: flyer.x + 8,
+    y: flyer.y + 6,
+    width: flyer.width - 16,
+    height: flyer.height - 12
+  };
+}
+
+function getPlayerHitboxForAirHazards(player) {
+  const widthInset = player.ducking ? 8 : 6;
+  const topInset = player.ducking ? 8 : 4;
+  const bottomInset = 2;
+
+  return {
+    x: player.x + widthInset,
+    y: player.y + topInset,
+    width: player.width - widthInset * 2,
+    height: player.height - topInset - bottomInset
   };
 }
 
@@ -258,9 +290,10 @@ function updatePterodactyls(dt) {
   }
 
   const p = state.player;
+  const playerHitbox = getPlayerHitboxForAirHazards(p);
   for (const flyer of state.pterodactyls) {
     flyer.x += flyer.vx * dt;
-    if (intersects(p, getPterodactylHitbox(flyer))) applyHit('Pterodactyl collision. Duck next time!');
+    if (intersects(playerHitbox, getPterodactylHitbox(flyer))) applyHit('Pterodactyl collision. Duck next time!');
   }
   state.pterodactyls = state.pterodactyls.filter((f) => f.x + f.width > state.cameraX - 150);
 }