It is acceptable to reference libraries that are not local as long as they are hosted by a reputable company you are not affiliated with. These files must be easily interpreted by chrome browser for windows.
The gui does not need to be flashy. All it requires are forms to take the api info (key, secret, etc), submit for api info, two tickers, indicator/feedback text confirming api authentication, forms for manual order details, submit for order execution. and a form for manual api commands with a submit.