BuildingTools/BuildingTools/UI.cs

using TechbloxModdingAPI;
using TechbloxModdingAPI.App;
using TechbloxModdingAPI.Interface.IMGUI;
using TechbloxModdingAPI.Tasks;
using Unity.Mathematics;
using UnityEngine;

namespace BuildingTools
{
    public class UI
    {
        private static Label _speedLabel = new Label(new Rect(Screen.width - 200, 0, 200, 20), "Speed: ", "SpeedLabel")
        {
            Enabled = false
        };

        public static void Init()
        {
            Game.Simulate += OnGameOnSimulate;
            Game.Edit += OnGameOnEditOrExit;
            Game.Exit += OnGameOnEditOrExit;
        }

        private static void OnGameOnSimulate(object sender, GameEventArgs args)
        {
            _speedLabel.Enabled = true;
            Scheduler.Schedule(new Repeatable(UpdateTask, ShouldLabelBeUpdated));
        }

        private static void OnGameOnEditOrExit(object sender, GameEventArgs args)
        {
            _speedLabel.Enabled = false;
        }

        private static void UpdateTask()
        {
            _speedLabel.Text = $"Speed: {math.length(Player.LocalPlayer?.Velocity ?? 0) * 3.6:F} km/h";
        }

        private static bool ShouldLabelBeUpdated()
        {
            return _speedLabel.Enabled;
        }
    }
}