Adding basic slime script

Assets/Scripts/basic_slime_script.cs

+using UnityEngine;
+using System.Collections;
+
+public class basic_slime_script : MonoBehaviour
+{
+    private Vector3 player_position;
+    private Vector3 slime_position;
+    private GameObject player;
+    private float x_diff;
+    private float y_diff;
+    
+
+    // Use this for initialization
+    void Start()
+    {
+        player = GameObject.FindGameObjectWithTag("Player");
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        //get position of player character
+        player_position = player.transform.position;
+
+        //get position of slime
+        slime_position = transform.position;
+
+        //compare to position of slime (self)
+        x_diff = player_position.x - slime_position.x;
+        y_diff = player_position.y - slime_position.y;
+ 
+        if (Mathf.Abs(x_diff) >= Mathf.Abs(y_diff))
+        {
+            //if move is valid, then move
+            if (x_diff < 0)
+            {
+                if (World.get((int)(slime_position.x - 1 + 0.5), (int)(slime_position.y + 0.5)).walkable == true)
+                    transform.position += Vector3.left;
+            }
+            if (x_diff > 0)
+            {
+                if (World.get((int)(slime_position.x + 1 + 0.5), (int)(slime_position.y + 0.5)).walkable == true)
+                    transform.position += Vector3.right;
+            }
+        }
+        else
+        {
+            //if move is valid, then move
+            if (y_diff < 0)
+            {
+                if(World.get((int)(slime_position.x + 0.5), (int)(slime_position.y - 1 + 0.5)).walkable == true)
+                    transform.position += Vector3.down;
+            }
+            if (y_diff > 0)
+            {
+                if (World.get((int)(slime_position.x + 0.5), (int)(slime_position.y + 1 + 0.5)).walkable == true)
+                    transform.position += Vector3.up;
+            }
+        }
+    }
+}