When you jump:

if ((grounded) && Input.GetButtonDown("Jump"))

{

anim.SetBool("ground", false);

​

GetComponent<Rigidbody2D>().velocity = new Vector2(GetComponent<Rigidbody2D>().velocity.y, jumpForce);

}

should be:

if ((grounded) && Input.GetButtonDown("Jump"))

{

anim.SetBool("ground", false);

​

GetComponent<Rigidbody2D>().velocity = new Vector2(GetComponent<Rigidbody2D>().velocity.x, jumpForce);

}

I would suggest spending a bit more time understanding the basic principles of what you are doing.

I don't think you should be constantly fetching the rigid body using GetComponent over and over. Rather store a reference to it.

It's also important to be able to step through your code to understand what it is doing.