Error on the jump java script

Questions & Answers
1

Hi , i am making a ball game but the jump script makes the ball falls very fast this is the script

var jumpSpeed = 8.0;
var gravity = 20.0;
private var roling = 0.00;

private var grounded : boolean = false;
private var jumping =false;

private var moveDirection = Vector3.zero;

var MSP : GUITexture;

var Monster : Transform;

function FixedUpdate() {

	if(Input.GetButtonDown("Launch"))
	{
		if(Ball.Launch)
		{
			if(TBallMonsterTransform.monster)
			{
				moveDirection.y = jumpSpeed;
				MSP.guiTexture.pixelInset.width -= 3;
				jumping =true;
			}
		}
	}	

if(jumping)
{
if(roling < 360)
{
Monster.transform.Rotate(0 , 10, 0);
roling += 10;
}
}

if(roling > 359)
{
jumping = false;
roling = 0;
}

moveDirection.y -= gravity * Time.deltaTime;

var controller : CharacterController = GetComponent(CharacterController);
var flags = controller.Move(moveDirection * Time.deltaTime);
grounded = (flags & CollisionFlags.CollidedBelow) != 0;
}

@script RequireComponent(CharacterController)
2

Change the gravity variable in the inspector.