I've just started out with my first game in Unity. It's a simple 2D Platformer with a tile-based level.   When coding in the movement, I used the Physics2D.OverlapCircle() and an empty to check whether my player was touching the ground. However, I need to use a layer to make sure only the ground is detected.

my code below

//fixed update used for physics calculations
void FixedUpdate()
{
    //right or left arrows being pressed
    float moveX = Input.GetAxis("Horizontal");

    Vector2 moveDir = new Vector2(moveX * playerSpeed, rb.velocity.y);
    rb.velocity = moveDir;
}
 
//update used for spacebar input and force
void Update()
{
    if (Input.GetKeyDown(KeyCode.Space)) 
    {
        rb.velocity = Vector2.up * jumpForce*Time.deltaTime;
    }
    
    //is my circle overlapping any other colliders
    Collider2D collider =  Physics2D.OverlapCircle(feet.position, checkRadius, groundLayer);
    Debug.Log(collider); 
}

end of code

When I tried assigning layers to my tiles, I couldn't find a way to do it. I would be really grateful if anyone could show me how to, or if anyone can tell me a more efficient way to deal with jumping in a 2D platformer. Thanks

EDIT: Thank you everyone for their help!

[![Game Scene View][2]][2]

I've just started out with my first game in Unity. It's a simple 2D Platformer with a tile-based level. 

When coding in the movement, I used the Physics2D.OverlapCircle() and an empty to check whether my player was touching the ground. However, I need to use a layer to make sure only the ground is detected.

my code below

//fixed update used for physics calculations
void FixedUpdate()
{
    //right or left arrows being pressed
    float moveX = Input.GetAxis("Horizontal");

    Vector2 moveDir = new Vector2(moveX * playerSpeed, rb.velocity.y);
    rb.velocity = moveDir;
}
 
//update used for spacebar input and force
void Update()
{
    if (Input.GetKeyDown(KeyCode.Space)) 
    {
        rb.velocity = Vector2.up * jumpForce*Time.deltaTime;
    }
    
    //is my circle overlapping any other colliders
    Collider2D collider =  Physics2D.OverlapCircle(feet.position, checkRadius, groundLayer);
    Debug.Log(collider); 
}

When I tried assigning layers to my tiles, I couldn't find a way to do it.

I would be really grateful if anyone could show me how to, or if anyone can tell me a more efficient way to deal with jumping in a 2D platformer.

I've just started out with my first game in Unity. It's a simple 2D Platformer with a tile-based level. When coding in the movement, I used the Physics2D.OverlapCircle() and an empty to check whether my player was touching the ground. However, I need to use a layer to make sure only the ground is detected.

my code below

//fixed update used for physics calculations
void FixedUpdate()
{
    //right or left arrows being pressed
    float moveX = Input.GetAxis("Horizontal");

    Vector2 moveDir = new Vector2(moveX * playerSpeed, rb.velocity.y);
    rb.velocity = moveDir;
}
 
//update used for spacebar input and force
void Update()
{
    if (Input.GetKeyDown(KeyCode.Space)) 
    {
        rb.velocity = Vector2.up * jumpForce*Time.deltaTime;
    }
    
    //is my circle overlapping any other colliders
    Collider2D collider =  Physics2D.OverlapCircle(feet.position, checkRadius, groundLayer);
    Debug.Log(collider); 
}

end of code

When I tried assigning layers to my tiles, I couldn't find a way to do it. I would be really grateful if anyone could show me how to, or if anyone can tell me a more efficient way to deal with jumping in a 2D platformer. Thanks

[![Game Scene View][2]][2]

I've just started out with my first game in Unity. It's a simple 2D Platformer with a tile-based level. When coding in the movement, I used the Physics2D.OverlapCircle() and an empty to check whether my player was touching the ground. However, I need to use a layer to make sure only the ground is detected.

my code below

//fixed update used for physics calculations
void FixedUpdate()
{
    //right or left arrows being pressed
    float moveX = Input.GetAxis("Horizontal");

    Vector2 moveDir = new Vector2(moveX * playerSpeed, rb.velocity.y);
    rb.velocity = moveDir;
}
 
//update used for spacebar input and force
void Update()
{
    if (Input.GetKeyDown(KeyCode.Space)) 
    {
        rb.velocity = Vector2.up * jumpForce*Time.deltaTime;
    }
    
    //is my circle overlapping any other colliders
    Collider2D collider =  Physics2D.OverlapCircle(feet.position, checkRadius, groundLayer);
    Debug.Log(collider); 
}

end of code

When I tried assigning layers to my tiles, I couldn't find a way to do it. I would be really grateful if anyone could show me how to, or if anyone can tell me a more efficient way to deal with jumping in a 2D platformer. Thanks

EDIT: Thank you everyone for their help!

[![Game Scene View][2]][2]