added the togglePause fonction in to gameManager and changed the pause instruction on ESC

src/main/java/pacmanGame/GameManager.java

@@ -35,8 +35,8 @@ public class GameManager {
 	}
 
 	public void ProcessInput(char inputChar) {
-		if(inputChar == 27) {
-			//todo: escape key pauses game
+		if(inputChar == 27) {// 27 = ESC
+			TogglePause();
 		} 
 		else if (inputChar == 'w' || inputChar == 's' || inputChar == 'd' || inputChar == 'a') {
 			player.processInput(inputChar);
@@ -68,5 +68,12 @@ public class GameManager {
 	public void Unpause() {
 		isPaused = false;
 	}
-	
+	public void TogglePause() {
+		if(isPaused) {
+			Unpause();
+		}
+		else {
+			Pause();
+		}
+	}
 }