Hi everyone,
Sometimes we need to tweak our variables at runtime i.e while running our build using Launch Button in playcanvas or after publishing the builds. I have utilized dat.gui.min.js to achieve this mechanic.
Use it in your projects without coding.
Just fire an event, to initialize the UI.
Set up folder names
Set up variables data
And best of luck 
Project Link: PlayCanvas 3D HTML5 Game Engine