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Player Sprite Doesn't Move (Unity, C#)

I was attempting to make a top down 2D shooter using Unity. My code contains no errors that I could see, RigidBody2D and PlayerMovement (code for the player to move) have been added to the sprite, and RigidBody2D has been added to the PlayerMovement. My move speed is set to 5. Please let me know what I can do to fix this issue!
Code:
using System.Collections.Generic;
using UnityEngine;
public class PlayerMovement : MonoBehaviour
{
public float moveSpeed;
public Rigidbody2D rb;
Vector2 movement;
void Update()
{
MovementInput();
}
private void FixedUpdate()
{
rb.velocity = movement * moveSpeed;
}
void MovementInput()
{
float mx = Input.GetAxisRaw("Horizontal");
float my = Input.GetAxisRaw("Vertical");
movement = new Vector2(mx, my).normalized;
}
}

Use your character sprite as the mouse cursor instead to write a code to make the player follow the mouse pos
If you really want to move your player via script this video will help you https://www.youtube.com/watch?v=0Qy3l3VuF_o
Have a good day :)

Check if your rigidbody2D's Body type is set to static, If it is then set it to kinematic or dynamic.
Also where did you import the script to?
Your code is not the problem, I tested it myself! Although you could move MovementInput(); to the FixedUpdate. Its not required though.
Edit: Image of the inspector as i have it if it helps

Move Object Along Raycast

I have made a Raycast that goes from my camera to the point of the object clicked. However, I am trying to make an object (in this case a bullet) to fly along the path of the ray. At the moment it flies straight forwards from the camera no matter where on the object you click because of the vector 3. How would I get it to follow the Ray?
C#
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class RaycastShot : MonoBehaviour {
public Camera camera;
private Ray ray;
private RaycastHit hit;
public GameObject bullet;
private GameObject createBullet;
private Collider collider;
void Update () {
if (Input.GetMouseButtonDown (0)) {
ray = camera.ScreenPointToRay (Input.mousePosition);
createBullet = Instantiate (bullet, camera.transform.position, bullet.transform.rotation);
createBullet.AddComponent<Rigidbody>();
createBullet.GetComponent<Rigidbody>().AddRelativeForce (new Vector3(0, 1500, 0));
createBullet.GetComponent<Rigidbody>().useGravity = false;
collider = createBullet.GetComponent<Collider> ();
Destroy (collider);
if (Physics.Raycast (ray, out hit)) {
}
}
Debug.DrawLine (ray.origin, hit.point, Color.red);
}
}

You would want to use ray.direction property instead of (0,1500,0) as the direction of the force.
The add force should occur in FixedUpdate, and should only occur if the Ray hits something. Where you have it now is probably not the best spot.
Of course, make sure the bullet gets instantiated at the camera's location first.
Ray.direction gives you the vector3 direction of the ray object. If you need the distance at which it hit, you could also use ray.distance.
Edit: I'm near my computer now, so here's a more detailed answer relating to your comments.
First off: Here's the way I set up the test Project:
I Created a prefab bullet. This is just a sphere with a rigidbody, with my "BulletController" script attached to it. The point of prefabs is to avoid all of those lines where you have to add components. For testing purposes I set the rigibody to ignore gravity and its mass to 0.1.
Next, I created the BulletController script, which will be attached to the bullet prefab.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class BulletController : MonoBehaviour {
Rigidbody rb;
public float bulletForce;
bool firstTime = false;
Vector3 direction;
// Use this for initialization
void Start () {
rb = GetComponent<Rigidbody> ();
}
public void SetDirection (Vector3 dir) {
direction = dir;
firstTime = true;
}
void OnCollisionEnter () {
//code for when bullet hits something
}
void FixedUpdate () {
if (firstTime) {
rb.AddForce (direction * bulletForce);
firstTime = false;
}
}
}
This script is is charge of controlling bullets. The (later on) script that will create the bullets doesn't really care what happens to them afterwards, since its job is just to create bullets. This BulletController script is in charge of dealing with bullets once they're created.
The main parts are the SetDirection method which tells the bullet which direction to travel in. Also it adds a one-time force in its FixedUpdate method that pushes it in the direction you just set. FixedUpdate is used for physics changes like adding forces. Don't use Update to do this kind of thing. It multiplies the force by a force that you set called "bulletForce".
Finally the BulletListener Script, which is simply attached to an empty game object in the scene. This script is in charge of listening for mouse clicks and creating bullets towards them.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class BulletListener : MonoBehaviour {
public Camera mainCamera;
public BulletController bulletPrefab;
void Update () {
if (Input.GetMouseButtonDown (0)) {
//create ray from camera to mousePosition
Ray ray = mainCamera.ScreenPointToRay (Input.mousePosition);
//Create bullet from the prefab
BulletController newBullet = Instantiate (bulletPrefab.gameObject).GetComponent<BulletController> ();
//Make the new bullet start at camera
newBullet.transform.position = mainCamera.transform.position;
//set bullet direction
newBullet.SetDirection (ray.direction);
}
}
}
In the inspector for this empty game object, I added this script, and then dragged the camera, and the bulletPrefab into the appropriate fields. Be sure to drag the prefab from the FOLDER, not from the SCENE. Since this will use the prefab, not an object in the scene.
Now click around and you'll see the bullets flying! Note that using a low force is good to test, and then increase it later.
The main things to take away from this is to split up your logic. A script should only be in charge of one thing. For example, your enemies might also fire bullets. You can now reuse your bulletController script for those bullets as well. Also, say you have different sized or shaped bullets, you can just drag the bulletcontroller script onto the different prefabs you've made for your bullets. This will not affect your listener script which will still create bullets where you click.

If you have the end point then you can move along the vector with MoveTowards:
Vector3 target = hit.point;
StartCoroutine(MoveAlong(target));
private IEnumerator MoveAlong(Vector3 target){
while(this.transform.position != target){
this.transform.position = MoveTowards(this.transform.position, target, step);
yield return null;
}
}

Fly swatter movement in Unity

I am creating a game on unity (my first 2D game) and the idea of this game is to kill a fly using swatter but the problem is in the fly movement (top to down) and the collision between the swatter and the fly.
This is my code but I don't know why the collision doesn't work
using UnityEngine;
using System.Collections;
public class SwatterController : MonoBehaviour {
public float speed = 1.5f;
private Vector3 target;
void Start () {
target = transform.position;
}
void Update () {
//Movement of swatter when I click on the screen
if (Input.GetMouseButtonDown(0)) {
target = Camera.main.ScreenToWorldPoint(Input.mousePosition);
target.z = transform.position.z;
}
transform.position = Vector3.MoveTowards(transform.position, target, speed * 5);
}
void OnCollisionEnter2D(Collision2D other){
Debug.Log ("dead");
}
}
and I would like to know how correct my code to get right movement of the swatter( the fly swatter is placed behind the camera)
and if you have an example please post it.
Objects used : Fly( circle collider 2D) , swatter(box collider 2D)

Tank does not shoot instantiated bullet

I started making a simple game in Unity3d: a tank to shoot at a wall (see image).
A GameObject is attached to the turret of the tank, and to this GameObject is attached the following script :
using UnityEngine;
using System.Collections;
public class Shooter : MonoBehaviour {
public Rigidbody bullet;
public float power = 1500f;
void Update () {
if (Input.GetButtonDown ("Fire1")) {
Rigidbody bulletRB = Instantiate (bullet, transform.position, transform.rotation) as Rigidbody;
Vector3 fwd = transform.TransformDirection(Vector3.forward);
bulletRB.AddForce(fwd*power);
}
}
}
When I press on the Fire1 button the bullet does not shoot. I put (for test) a Debug.Log("BULLET SHOOT") after bulletRB.addForce(). The message is displayed, so the script reached this point. What is wrong with my code?

Based on this somewhat similar question on Unity Answers, you should probably be instantiating the GameObject of the bullet prefab/instance, rather than its Rigidbody directly. Then, access the Rigidbody component of that new bullet and add the force.
Your adjusted Update() method would then look like:
void Update () {
if (Input.GetButtonDown ("Fire1")) {
GameObject newBullet = Instantiate (bullet.gameObject, transform.position, transform.rotation) as GameObject;
RigidBody bulletRB = newBullet.GetComponent<Rigidbody>();
Vector3 fwd = transform.TransformDirection(Vector3.forward);
bulletRB.AddForce(fwd*power);
}
}
Another thing you may want to change is using transform.forward (aka. Forward vector of the turret) rather than Vector3.forward (global forward vector Vector3(0, 0, 1), which may not match the direction of the turret).
Hope this helps! Let me know if you have any questions.

Force can be applied only to an active rigidbody. If a GameObject is inactive, AddForce has no effect.
Wakes up the Rigidbody by default. If the force size is zero then the Rigidbody will not be woken up.
The above description is taken from Unity
Therefore, I would suggest to check if the GameObject is active first.
You can test it by doing the following:
if (newBullet.activeInHierarchy === true)
{
//active
}else{
//inactive
}

2D Collision & Stop in Unity 3D

I have a simple scene in 2D. The right yellow box is the "Player", while the green & brown thing is the "Obstacle".
Player has a BoxCollider2D, RigidBody2D and a C# script named Hero.cs attached to it. BoxCollider2D enabled Is Trigger; RigidBody2D enabled Is Kinematics; other settings are left in default values.
Obstacle has only a BoxCollider2D with Is Trigger enabled.
and here is the Hero.cs:
using UnityEngine;
using System.Collections;
public class Hero : MonoBehaviour {
public float moveSpeed = 0.1f;
private Vector3 moveDirection;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
Vector3 currentPos = transform.position;
if(Input.GetKey("left")) {
transform.Translate(new Vector3(-1, 0, 0));
} else if(Input.GetKey("right")) {
transform.Translate(new Vector3(1, 0, 0));
}
}
void OnCollisionEnter2D(Collision2D collision) {
Debug.Log("Colliding");
}
void OnTriggerEnter2D(Collider2D other) {
Debug.Log("Triggering");
}
}
Only "Triggering" appears in Console Log.
My question is: What should I add to make the "Player" inaccessible to the "Obstacle" (no need to bounce away)?
Note: Using Unity 4.5
Update: After I set Gravity Scale to 0, collision detection works, but in a strange way. The "Player" go sideway during collision. Watch this YouTube video for action.
I expect the Player only go along X or Y axis. What did I miss ?

IsTrigger
Triggers let other colliders pass through without any collision happening. They are only triggering an event, hence the name.
If you disable IsTrigger for both objects, you will get collisions and the corresponding events are fired.
More infos here: http://docs.unity3d.com/Manual/CollidersOverview.html
IsKinematic
Kinematic rigidbody colliders will only collide with other non-kinematic rigidbody colliders.
Have a look at this matrix http://docs.unity3d.com/Manual/CollisionsOverview.html
Disable IsKinematic and move the player with MovePosition if you don't want to use force values to move the player.