Put the finishing touches on my Thunkable app!

I've been building a Thunkable app that needs to be finished off, but I don't have the skills to do the last few things that need to be done. Web viewer components are not sizing correctly and causing problems with the button positioning, so you'll need the skills to be able to get the dimensions of the web viewer window and pass that through to the app. I also want to make sure my layered interactive graphic will work at all screen sizes. The app isn't huge - about 12-15 screens total, but my own javascript skills aren't strong enough to finish the job.