How to test button functionality in Simulator and how to publish as Plugin. Can you please help?

[upenr]

I have created a sample webpage (HTML+Javascript) that I intend to post as an ungraded lesson to a student. There is a button in this webpage which the student would click to open a live lab environment. On the simulator, the webpage is displayed, but I am unable to click the button inside the webpage.

I need a little guidance from someone to
a) Check my index.html and manifest.json to ensure everything is in place.
b) If the files are good, provide an overview of how to package and submit this as a Plugin.

Here is the project: https://github.com/upenr/ibm-live-labs

Thanks and regards.