It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

Just to inform all interested in Tesla Force under Linux:

I asked 10tons about the currently lacking Linux support and got the answer on 18. Sep. 2020:

"Linux isn't supported during early access since we would have to update
 multiple builds constantly and we'd have less time to develop
 the game itself.
 We'll be supporting Linux when the full launch happens later this year."

So 10tons will provide Linux support ... which is very welcome as their games are of really high quality.

Looks like the full launch is ready now. If the developer reads this: Can you estimate when the Linux version will be available?