Issues with 2d Player controller(Kinematic)

Hi guys,

I am facing issues with my player controller.

• When i jump upon landing my character goes inside the ground.

marked in red are my rays. https://ibb.co/6b1pcTK

https://ibb.co/kgH2tX2

• even the jump is to fast in up and down.

Link to project https://github.com/DemonJAZ/WalkInForest2DGame

@DCordoba

@highpockets Below is my script

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerController : MonoBehaviour
 {
     private bool grounded = false;
     public float gravitymodifier = 1f;
     public float jumpspeed = 1f;
     public float movementSpeed;
     private Vector2 Velocity;
     private Rigidbody2D Pico;
 
 
 
     // Start is called before the first frame update
     void Start()
     {
         Pico = gameObject.GetComponent<Rigidbody2D>();
     }
     private void Update()
     {
 
         Debug.DrawRay(Pico.position + new Vector2(0.3f,-0.6f), Vector2.down*0.1f,Color.red);
         Debug.DrawRay(Pico.position + new Vector2(-0.3f,-0.6f), Vector2.down * 0.1f, Color.red);
         Debug.DrawRay(Pico.position + new Vector2(0f, -0.7f), Vector2.down * 0.1f, Color.red);
 
         Debug.DrawRay(Pico.position + new Vector2(0.34f, 0.6f), Vector2.right * 0.1f, Color.red);
         Debug.DrawRay(Pico.position + new Vector2(0.34f, 0f), Vector2.right * 0.1f, Color.red);
         Debug.DrawRay(Pico.position + new Vector2(0.34f, -0.6f), Vector2.right * 0.1f, Color.red);
 
 
         if (Input.GetKeyDown(KeyCode.Space) && grounded)
         {
             Velocity.y = jumpspeed * Time.deltaTime;
 
             Pico.position += Velocity;
             grounded = false;
         }
     }
     // Update is called once per frame
     private void FixedUpdate()
     {
         if (Input.GetKey(KeyCode.A))
         { 
             Velocity.x = -movementSpeed * Time.deltaTime;
         }
         else if (Input.GetKey(KeyCode.D))
         {
             Velocity.x = movementSpeed * Time.deltaTime;
         }
         else
         {
             Velocity.x = Vector2.zero.x;
         }
 
         if ( (Velocity.x != 0.0f) && HorizontalCollision() )
         {
             Velocity.x = Vector2.zero.x;
         }
 
         if (!grounded)
         {
             Velocity.y += gravitymodifier * Time.deltaTime;
         }
 
         if (VerticalCollisions() && !grounded)
         {
             Velocity.y = 0;
             grounded = true;
         }
 
 
         Pico.position += Velocity;
     }
 
     private bool VerticalCollisions()
     {
         return Physics2D.Raycast(Pico.position + new Vector2(0.3f, -0.6f), Vector2.down, 0.1f) ||
                 Physics2D.Raycast(Pico.position + new Vector2(-0.3f, -0.6f), Vector2.down, 0.1f) ||
                 Physics2D.Raycast(Pico.position + new Vector2(0f, -0.7f), Vector2.down, 0.1f);
     }
     private bool HorizontalCollision()
     {
         float directionX = Mathf.Sign(Velocity.x);
         bool v = (directionX == -1.0f);
         Vector2 castDirection = v ? Vector2.left : Vector2.right;
 
         return Physics2D.Raycast(Pico.position + new Vector2(directionX *.34f, -0.6f), castDirection, 0.1f) ||
                 Physics2D.Raycast(Pico.position + new Vector2(directionX * 0.34f, -0.6f), castDirection, 0.1f) ||
                 Physics2D.Raycast(Pico.position + new Vector2(directionX * 0.34f, -0.7f), castDirection, 0.1f);
     }
 }