Finished basic lobby code

Assets/Scripts/MainMenu/MainMenuController.cs

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+using PashaBibko.PenguinChase.Core.Network;
+using UnityEngine.UI;
+using UnityEngine;
+
+public class MainMenuController : MonoBehaviour
+{
+    [Header("References")]
+    [SerializeField] private Button HostButton;
+    [SerializeField] private Button JoinButton;
+
+    private void Start()
+    {
+        HostButton.onClick.AddListener(() =>
+        {
+            Network.CurrentTransport = TransportType.Localhost;
+            Network.Host();
+        });
+
+        JoinButton.onClick.AddListener(() =>
+        {
+            Network.CurrentTransport = TransportType.Localhost;
+            Network.Join("");
+        });
+    }
+}

Assets/Scripts/MainMenu/MainMenuController.cs.meta

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+fileFormatVersion: 2
+guid: 0e21d4c5d0ed58b48ab78ffe9eb72e6a