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Assets/Scripts/UI/UIGate.cs

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+using System.Collections;
+using System.Collections.Generic;
+using Unity.VectorGraphics;
+using UnityEngine;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
+
+namespace UntitledLogicGame.UI
+{
+    public class UIGate : MonoBehaviour, IPointerDownHandler
+    {
+        #region Unity Properties
+
+        #endregion
+
+        #region Public Properties
+
+        public Gate GatePrefab {
+            set
+            {
+                _gatePrefab = value;
+                var sprite = _gatePrefab.GetComponentInChildren<SpriteRenderer>().sprite;
+                GetComponent<SVGImage>().sprite = sprite;
+                RectTransform.sizeDelta = new Vector2(100 * sprite.rect.width / 700f, 100); // TODO get max width from UIManager
+                gameObject.name = "UI_" + _gatePrefab.GateType.ToString();
+            }
+        }
+
+        public RectTransform RectTransform
+        {
+            get
+            {
+                if (_rectTransform == null)
+                    _rectTransform = GetComponent<RectTransform>();
+                return _rectTransform;
+            }
+        }
+
+        #endregion
+
+        #region Private Properties
+
+        private Gate _gatePrefab;
+        private RectTransform _rectTransform;
+
+        #endregion
+
+        #region Unity Methods
+
+        public void OnPointerDown(PointerEventData eventData)
+        {
+            var position = Camera.main.ScreenToWorldPoint(transform.position);
+            position.z = 0f;
+            GameManager.Instance.CreateGate(_gatePrefab, position);
+        }
+
+        #endregion
+
+        #region Public Methods
+
+        #endregion
+
+        #region Private Methods
+
+        #endregion
+    }
+}

Assets/Scripts/UI/UIGate.cs.meta

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+guid: 6a451c18bcd06994d8ac3b549cff313d
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/UI/UIManager.cs

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+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+
+namespace UntitledLogicGame.UI
+{
+    public class UIManager : MonoBehaviour
+    {
+        #region Unity Properties
+
+        [Header("Components")]
+        public GameObject GateBar;
+
+        [Header("Prefabs")]
+        public UIGate UIGatePrefab;
+
+        #endregion
+
+        #region Public Properties
+
+        #endregion
+
+        #region Private Properties
+
+        private bool _lastMouseInteracting;
+
+        #endregion
+
+        #region Unity Methods
+
+        private IEnumerator Start()
+        {
+            yield return new WaitUntil(() => GameManager.Instance != null);
+            // TODO calculate max width
+            var currentPos = 0f;
+            foreach(var gatePrefab in GameManager.Instance.GatePrefabs)
+            {
+                var uiGate = Instantiate(UIGatePrefab, GateBar.transform);
+                uiGate.GatePrefab = gatePrefab;
+                uiGate.RectTransform.anchoredPosition = new Vector2(currentPos, 0);
+                currentPos += uiGate.RectTransform.sizeDelta.x;
+            }
+            
+        }
+
+        private void FixedUpdate()
+        {
+            if(MouseManager.Instance.Interacting != _lastMouseInteracting)
+            {
+                //TODO animate go down
+                GateBar.SetActive(!MouseManager.Instance.Interacting);
+                _lastMouseInteracting = MouseManager.Instance.Interacting;
+            }
+        }
+
+        #endregion
+
+        #region Public Methods
+
+        #endregion
+
+        #region Private Methods
+
+        #endregion
+    }
+}

Assets/Scripts/UI/UIManager.cs.meta

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+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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