Player Controller help with touch controls

Can someone please give me an example of a touch control script that works,

I've tried the sample Input.GetTouch and it doesn't work,

1. Can someone please provide me a working touch player control script that:
a. when the player taps the screen the player object moves towards that direction for a certain distance
b. also set a rate of tapping so they cannot spam the movement
c. call a sprite when the screen is touched e.g. the rocket will show a thrusting flare if the screen is touched to represent movement

2. How do I test this is unity game scene preview since I cannot use touch, How do i set my mouse left click to represent touch.

I am still in the learning phase of C# it would be really helpful and appreciated any one provide me a sample script for me to work on.

This is a 2D game!

Cheers,

Tony

 

publicclassRocketMovement : MonoBehaviour {

publicfloatspeed;
privateVector3target;



//Initalisation
voidStart () {
target = transform.position;
}


//InputandGraphics
voidUpdate () {
if (Input.GetMouseButtonDown(0)) {
target = Camera.main.ScreenToWorldPoint(Input.mousePosition);
target.z = transform.position.z;
}
transform.position = Vector3.MoveTowards(transform.position, target, speed * Time.deltaTime);
}

}


How do I get gravity working with this script because its horrible with gravity.
Also how do I only make it so that the object only travels a certain distance to the touch/mouse position and not all the way?

Please help thanks!