Insanely huge initial commit

Assets/Scripts/ArrowController.cs

@@ -0,0 +1,35 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class ArrowController : MonoBehaviour
+{
+    // Left, down, up, right arrow sprites.
+    [SerializeField] public Sprite[] arrowSprites;
+    [SerializeField] public GameObject successObject;
+    [SerializeField] public GameObject failObject;
+    [SerializeField] public Image image;
+    public int key = 0;
+
+    public void Init()
+    {
+        image.sprite = arrowSprites[key];
+    }
+
+    public void Succeed()
+    {
+        GameObject o = Instantiate(successObject);
+        o.transform.position = transform.position;
+        o.transform.SetParent(this.transform);
+        image.color = Color.clear;
+    }
+
+    public void Fail()
+    {
+        GameObject o = Instantiate(failObject);
+        o.transform.position = transform.position;
+        o.transform.SetParent(this.transform);
+        image.color = Color.clear;
+    }
+}