Projectile causes main character to be pushed back

Questions & Answers
1

I have the main_character:

public class MainCharacterMovement : MonoBehaviour
{
	public Rigidbody2D projectile;
	public float speed = 10;

	// Use this for initialization
	void Start ()
	{
	}
	
	// Update is called once per frame
	void Update ()
	{
		//GetKeyDown checks if a button is clicked, but GetKey checks if a button is held down.

		//LEFT
		if (Input.GetKey (KeyCode.LeftArrow))
		{
			transform.Translate(-1 * Vector2.right);
		}

		//RIGHT
		if (Input.GetKey (KeyCode.RightArrow))
		{
			transform.Translate(Vector2.right);
		}

		//UP
		if (Input.GetKey(KeyCode.UpArrow))
		{
			transform.Translate(Vector2.up);
		}

		//DOWN
		if (Input.GetKey(KeyCode.DownArrow))
		{
			transform.Translate(-1 * Vector2.up);
		}
		
		//SPACE BAR (attack)
		if(Input.GetKey(KeyCode.Space) && GameObject.Find("weapon_1(Clone)") == null)
		{
			Vector3 frontPosition = new Vector3(transform.position.x + 2, transform.position.y, transform.position.z);
			Rigidbody2D cloneProjectile = (Instantiate(projectile, frontPosition, transform.rotation)) as Rigidbody2D;
			cloneProjectile.velocity = transform.TransformDirection(new Vector3(speed, 0, 0));
		}
	}
}

Then I have the weapon_1 movement:

public class Weapon1Movement : MonoBehaviour
{
	private int frame;
	public Rigidbody2D ball;

	// Use this for initialization
	void Start ()
	{
		frame = 0;
	}
	
	// Update is called once per frame
	void Update ()
	{
		frame++;
		if (frame >= 10) 
		{
			Destroy(this.gameObject);
		}
	}
}

I have 2 issues:

  1. When the space bar is hit to create the project (weapon_1), the main_character is pushed back. I’m not sure why this could be.
  2. When the main_character is moving up/down and shoots at the same time, it creates an angle for the main_character sprite. Then it keeps moving. I’m not sure why this is either.

Here is Inspector tab for the weapon_1 sprite:

48630-weapon-1-inspector.jpg
48630-weapon-1-inspector.jpg809×957 115 KB

Please let me know if there is anything else you need. I’m a Unity newbie.

2

front position X is 2 units and heroes circle collider has radius 2 units

my guess (as i can’t see the script) that projectile collides with hero collider so it pushes it back

try to change front position to

 Vector3 frontPosition = new Vector3(transform.position.x+ 2+( safe zone number depending on how projectile collider is big and positioned ), transform.position.y, transform.position.z);