fixed the bug described in the first issue

src/Controller.cpp

@@ -1,6 +1,7 @@
 #include "Controller.h"
 #include <assert.h>
 #include <string>
+
 using namespace std;
 
 Controller::Controller()

src/Game.cpp

@@ -1,5 +1,6 @@
 #include "Game.h"
 #include <algorithm>
+#include <limits.h>
 using namespace std;
 
 SnakeGame::SnakeGame()
@@ -60,7 +61,8 @@ void SnakeGame::play(void){
         
         play(playerName); //get the player to play the game
 
-
+        cin.clear();
+        cin.ignore(numeric_limits<streamsize>::max(), '\n');
         cout << "Do you want to play again? (yes or no): ";
         string ans;