private void Window_KeyUp(object sender, KeyEventArgs e)
{
switch (e.Key)
{
case (Key.W):
game.KeyReleased('w');
break;
case (Key.A):
game.KeyReleased('a');
break;
case (Key.S):
game.KeyReleased('s');
break;
case (Key.D):
game.KeyReleased('d');
break;
default:
break;
}
}
