Hackish Multiplayer

using System;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : MonoBehaviour
{
    public LayerMask blockLayer = 1;
    public float range = Mathf.Infinity;

    RaycastHit hit;
    float mouseX = 0;
    float mouseY = 0;
    Action guiState;
    GameObject[, ,] level = new GameObject[256, 256, 256];
    string chatString = string.Empty;
    List<string> chatMessages = new List<string>(10);
    List<KeyValuePair<string, object>> rpcQueue = new List<KeyValuePair<string, object>>();

    float sensitivity = 1.0f;
    void Start()
    {
        Application.runInBackground = true;

        transform.position = new Vector3(128, 128, 120);
        Action game = () =>
        {
            GUI.color = Color.white;
            foreach (var item in chatMessages)
                GUILayout.Label(item);
            if (!Screen.lockCursor)
            {
                chatString = GUILayout.TextField(chatString);
                if (GUILayout.Button("Send"))
                {
                    RPCChat(chatString);
                    chatString = string.Empty;
                }
                sensitivity = GUILayout.VerticalSlider(sensitivity, 0, 1);

            }
            GUI.color = new Color(1, 1, 1, 0.25f);
            GUI.Box(new Rect(Screen.width / 2 - 4, Screen.height / 2 - 4, 8, 8), GUIContent.none);
        };

        string addr = "127.0.0.1";
        Action menu = () =>
        {
            Rect wnd = new Rect(Screen.width / 2 - 75, Screen.height / 2 - 64, 150, 128);
            GUILayout.BeginArea(wnd);
            addr = GUILayout.TextField(addr, GUILayout.ExpandWidth(true));
            if (GUILayout.Button("Join Game", GUILayout.ExpandHeight(true)))
            {
                Network.Connect(addr, 48484);
                guiState = game;
            }
            if (GUILayout.Button("Host Game", GUILayout.ExpandHeight(true)))
            {
                Network.InitializeServer(32, 48484, !Network.HavePublicAddress());
                guiState = game;
                RPCBuild(new Vector3(128, 128, 128));
            }
            GUILayout.EndArea();
        };

        guiState = menu;
    }

    void OnPlayerDisconnected(NetworkPlayer player)
    {
        if (Network.isServer)
        {
            EvtChat("@ Player Disconnected");
        }
    }

    void OnPlayerConnected(NetworkPlayer player)
    {
        if (Network.isServer)
        {
            foreach (var rpc in rpcQueue)
            {
                networkView.RPC(rpc.Key, player, rpc.Value);
            }
            networkView.RPC("EvtChat", player, "Press Left Ctrl to switch play/chat.");
            EvtChat("@ Player Connected");
        }
    }

    private void RPCBuild(Vector3 position)
    {
        networkView.RPC("EvtBuild", RPCMode.All, position);
    }

    private void RPCErase(Vector3 position)
    {
        if (position != new Vector3(128, 128, 128)) // GOD BLOCK
            networkView.RPC("EvtErase", RPCMode.All, position);
    }

    private void RPCChat(string message)
    {
        networkView.RPC("EvtChat", RPCMode.All, message);
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.LeftControl))
            Screen.lockCursor = !Screen.lockCursor;

        if (Input.GetKeyDown(KeyCode.Return) && !string.IsNullOrEmpty(chatString))
        {
            RPCChat(chatString);
            chatString = string.Empty;
        }

        if (!Screen.lockCursor)
            return;

        transform.Translate(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
        mouseX += Input.GetAxis("Mouse X") * 10.0f * sensitivity;
        mouseY = Mathf.Clamp(mouseY + Input.GetAxis("Mouse Y") * 10.0f * sensitivity, -90, 90);
        transform.rotation = Quaternion.Euler(-mouseY, mouseX, 0);

        if (Input.GetMouseButtonDown(0) && HitBlock())
            RPCBuild(hit.transform.position + hit.normal);
        if (Input.GetMouseButtonDown(1) && HitBlock())
            RPCErase(hit.transform.position);
    }


    [RPC]
    void EvtBuild(Vector3 position)
    {
        if (Network.isServer)
            rpcQueue.Add(new KeyValuePair<string, object>("EvtBuild", position));

        var cube = GameObject.CreatePrimitive(PrimitiveType.Cube);
        cube.transform.position = position;
        int x = Mathf.RoundToInt(position.x);
        int y = Mathf.RoundToInt(position.y);
        int z = Mathf.RoundToInt(position.z);
        level[x, y, z] = cube;
    }

    [RPC]
    void EvtErase(Vector3 position)
    {
        if (Network.isServer)
            rpcQueue.Add(new KeyValuePair<string, object>("EvtErase", position));

        int x = Mathf.RoundToInt(position.x);
        int y = Mathf.RoundToInt(position.y);
        int z = Mathf.RoundToInt(position.z);
        Destroy(level[x, y, z]);
    }

    [RPC]
    void EvtChat(string message)
    {
        if (Network.isServer)
            rpcQueue.Add(new KeyValuePair<string, object>("EvtChat", message));

        chatMessages.Add(message);
        if (chatMessages.Count > 10)
            chatMessages.RemoveAt(0);
    }

    bool HitBlock()
    {
        return Physics.Raycast(transform.position, transform.forward, out hit, range, blockLayer);
    }

    void OnGUI()
    {
        if (guiState != null)
            guiState();
    }
}