Scartch Level 2 - Racing Game

1.I had many difficulties such  as how to setting 2 players, how to activate the game... because scratch is new to me. For instance, it`s really complicated to set 2 players moving separately because if we press up button , both of them will move. So i have to set everything different for each one so that this one will not be affected while we control the other.
2.I added the countdown before starting and two players because it will make this game be my own game and it will be more interesting, more attractive to players 

Link:Racing Game