Add Player class and basic movement code

Assets/Scripts/src/Base/GameplayComponent.cs

@@ -0,0 +1,9 @@
+using UnityEngine;
+
+namespace src.Base
+{
+    public abstract class GameplayComponent : MonoBehaviour
+    {
+        
+    }
+}

Assets/Scripts/src/Base/PlayerBase.cs

@@ -0,0 +1,7 @@
+namespace src.Base
+{
+    public abstract class PlayerBase : GameplayComponent
+    {
+        public float movementSpeed = 4f;
+    }
+}

Assets/Scripts/src/Player/Player.cs

@@ -0,0 +1,48 @@
+using System;
+using src.Base;
+using UnityEngine;
+
+namespace src.Player
+{
+    public class Player : PlayerBase
+    {
+        /* Movement */
+        private Rigidbody2D _rigidbody2d;
+
+        private void Start()
+        {
+            _rigidbody2d = GetComponent<Rigidbody2D>();
+        }
+
+        private void Update()
+        {
+            HandleMovement();
+        }
+
+        private void HandleMovement()
+        {
+#if UNITY_EDITOR || UNITY_STANDALONE || UNITY_WEBGL
+            var horizontal = Input.GetAxis("Horizontal");
+            var vertical = Input.GetAxis("Vertical");
+
+            // Restrict movement in only one axis at the same time.
+            if (Math.Abs(vertical) > 0.00001)
+            {
+                horizontal = 0;
+            }
+            else
+            {
+                vertical = 0;
+            }
+
+            var movementVector = new Vector2(horizontal, vertical);
+
+            _rigidbody2d.position += movementSpeed * Time.deltaTime * movementVector;
+#elif UNITY_IOS || UNITY_ANDROID
+    // Phone movement is not supported yet.
+#elif UNITY_PS4 || UNITY_XBOXONE
+    // Console movement is not supported yet.
+#endif
+        }
+    }
+}