Player.cs

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Player : MonoBehaviour
{
    public Transform Green;
    public Transform Blue;
    public float Speed;
    public LayerMask EverythingLayerMask;

    private int current = 0;
    private float cooldownRemaining;

    void Start()
    {
        cooldownRemaining = 1 / Speed;
        Vector3 position = transform.position;
        position = GetCharacter().position;
        position = new Vector3(position.x, position.y, -5.0f);
        transform.position = position;
    }

    void Update()
    {
        Vector3 toMove = Vector3.zero;

        // Decrease cooldown
        if (cooldownRemaining > 0.0f)
        {
            cooldownRemaining -= Time.deltaTime;
        }

        // Apply controls
        toMove += new Vector3(Mathf.Round(Input.GetAxisRaw("Horizontal")) * (cooldownRemaining <= 0.0f ? 1.1f : 0.0f), 0.0f, 0.0f);
        toMove += new Vector3(0.0f, Mathf.Round(Input.GetAxisRaw("Vertical")) * (cooldownRemaining <= 0.0f ? 1.1f : 0.0f), 0.0f);

        // Reset cooldown
        if ((Input.GetAxis("Horizontal") != 0 || Input.GetAxis("Vertical") != 0) && cooldownRemaining <= 0.0f)
        {
            cooldownRemaining = 1 / Speed;
        }

        // Collision
        /*Collider2D[] hits;
        LayerMask layerMask = ~0;
        ContactFilter2D contactFilter = new ContactFilter2D();
        contactFilter.SetLayerMask(layerMask);
        contactFilter.useDepth = true;
        contactFilter.minDepth = -Mathf.Infinity;
        contactFilter.maxDepth = Mathf.Infinity;*/
        Collider2D[] hits = Physics2D.OverlapCircleAll(GetCharacter().position, 1.0f, EverythingLayerMask);
        if (hits.Length > 0)
        {
            int direction = Mathf.Abs(GetDirection(hits[0].transform.position));
            if (direction == 1)
            {
                toMove.x = 0;
            } else if (direction == 2)
            {
                toMove.y = 0;
            }

            if (direction != 0)
            {
                Debug.Log(direction);
            }
        }

        // Move
        GetCharacter().position += toMove;

        // Character switching
        if (Input.GetKeyDown(KeyCode.Tab))
        {
            current = current == 0 ? 1 : 0;
        }

        // Camera
        Vector3 position = transform.position;
        position = Vector3.MoveTowards(position, GetCharacter().position, 0.5f);
        position = new Vector3(position.x, position.y, -5);
        transform.position = position;
    }

    Transform GetCharacter()
    {
        return current == 0 ? Green : Blue;
    }

    int GetDirection(Vector3 pos)
    {
        if (pos.x < GetCharacter().position.x)
        {
            return -1;
        } if (pos.x > GetCharacter().position.x)
        {
            return 1;
        } if (pos.y < GetCharacter().position.y)
        {
            return -2;
        } if (pos.y < GetCharacter().position.y)
        {
            return 2;
        }

        return 0;
    }
}