update

src/main/java/BattleShip/GridGUI.java

@@ -104,7 +104,11 @@ public class GridGUI {
                         cell.setBackground(Color.red);
                     }
                 }
-
+                for(Ship sh : allShips) {
+                    if(!sh.isKilled()) {
+                        gameOver = false;
+                    }
+                }
             }
         }
     }