The newly released Beta 10 includes a revised version of the mod support.
The new version allows you to easily create your own mods using regular web technologies like HTML, CSS and Javascript.
You can use Chome Developer Tools to develop your mod. Simply turn on Developer Mode in the options view in Startup Company.
Example and documentation can be found on our Github Wiki:
Startup Company Wiki: Modding.
If you need any help, please don't hestitate to contact me directly on Discord: Hovgaard Games Discord Server. My username is jhovgaard and I'm almost always available to help you out, just leave me a DM :-)
I am currently working on adding support for pushing your mods to Steam Workship directly from the game. More on that later.
That's all for now. I am really really looking forward to see all your awesome ideas come to life!
All the best,
Jonas