diff --git a/frontend/public/games/Balloon Popper/script.js b/frontend/public/games/Balloon Popper/script.js
index 7c12451f..7c5d7c75 100644
--- a/frontend/public/games/Balloon Popper/script.js	
+++ b/frontend/public/games/Balloon Popper/script.js	
@@ -96,6 +96,6 @@ function resetGame() {
 document.getElementById("restart-btn").addEventListener("click", resetGame);
 
 // Balloon spawner
-setInterval(spawnBalloon, 800);
+clearInterval(window.__interval); window.__interval = setInterval(spawnBalloon, 800);
 
 update();
diff --git a/frontend/public/games/Fruit Slice/script.js b/frontend/public/games/Fruit Slice/script.js
index d78c0ce6..4b8a6d3d 100644
--- a/frontend/public/games/Fruit Slice/script.js	
+++ b/frontend/public/games/Fruit Slice/script.js	
@@ -98,6 +98,6 @@ canvas.addEventListener("mousemove", (e) => {
 document.getElementById("restart-btn").addEventListener("click", resetGame);
 
 // Spawn fruits continuously
-setInterval(spawnFruit, 900);
+clearInterval(window.__interval); window.__interval = setInterval(spawnFruit, 900);
 
 update();
diff --git a/frontend/public/games/color grid/script.js b/frontend/public/games/color grid/script.js
index b9e04678..b67111d1 100644
--- a/frontend/public/games/color grid/script.js	
+++ b/frontend/public/games/color grid/script.js	
@@ -195,7 +195,7 @@ function checkWin(){
   if(isSolved()){
     // update best if necessary
     const key = bestKey(SIZE);
-    const prevBest = parseInt(localStorage.getItem(key) || '0',10) || 0;
+    const prevBest = parseInt(localStorage.getItem(key, 10) || '0',10) || 0;
     if(prevBest===0 || moves < prevBest){
       localStorage.setItem(key, moves);
       bestEl.textContent = moves;
diff --git a/frontend/public/scripts/minesweeper.js b/frontend/public/scripts/minesweeper.js
index a87f3deb..de3b9236 100644
--- a/frontend/public/scripts/minesweeper.js
+++ b/frontend/public/scripts/minesweeper.js
@@ -329,7 +329,7 @@ class Minesweeper {
             // Restore board content
             document.querySelectorAll('.cell').forEach(cell => {
                 cell.style.background = cell.style.originalBackground || '';
-                const row = parseInt(cell.dataset.row);
+                const row = parseInt(cell.dataset.row, 10);
                 const col = parseInt(cell.dataset.col);
                 this.updateCellDisplay(row, col);
             });