Hey I just did the tic-tac-toe game = it was fun but boring - i did not really understand the code and there should been an exercise - to say modify it at different points - so u can learn how it works- eg. instead of using x and o - change it to a and b (letters instead of x and o)- etc - so it was not challenging enough - also the instructions are too scattered and unclear on how to do at home - so i did not bother doing it.