Update Implementation AIGridGUI class

src/main/java/BattleShip/AIGridGUI.java

@@ -361,6 +361,19 @@ public class AIGridGUI extends JPanel {
                 cellsHit[guessLocation] = true;
             }
         }
+
+        //Mark game as not over unless all ships killed.
+        for(Ship sh : allShips) {
+            if(!sh.isKilled()) {
+                gameOver = false;
+            }
+        }
+
+        //Game over message.
+        if(gameOver) {
+            text = "You Lost in " + numOfGuesses + " guesses.";
+            endGame = true;
+        }
     }
 
     //Return the location of a cell one space in the given direction, or return -1 if out of bounds.