I was playing with Roll20 and didn’t really like how complicated it all is.
I have been experimenting with using Google Slides to run an online ICRPG session, as it already has inbuilt chat and syncs changes in real-time, allowing for people to move tokens around.
The other thing I needed was a dice roller. So I quickly coded one up.
I will release everything as a modular creation kit once I have put a bit more time into it.
That’s pretty sweet, dude! Have you heard if Slides made the Google cut? I know both G+ and Hangouts are sadly getting snuffed in 2019.
The dice roller and maps are most excellent. 
Google hangouts isn’t being cut. The video side has been rebranded as Google Meet and the text chat side has been remade into a sorta slack type application currently called Hangouts Chat.
Slides is a core part of Google’s GSuite offering, which is their direct competition package to Microsoft office. Is not going anywhere.
I have to say, Roll20 has a pretty shallow learning curve, and it’s actually a bit more simple than at first blush. I’d encourage anyone to give it a second look.
That being said, what you have done here is really really cool. As a simple interface, this is a fantastic alternative. Nice work!