Uber... please test your UI on 4:3 monitors...

If you can't make them compatible at the very least make it obvious that they can be scrolled.

This problem isn't really related to 4:3, task on bugtracker here: PA#3631
So it's present on 1366x768 too.

The game has a minimum screen resolution of 1280x720(16:9). So it appears that 4:3 monitors are not supported.
- http://support.uberent.com/kb/faq.php?id=41

4:3 hasn't really been used in what, a decade?

This isn't problem of 1280 width.
Same problem appear on 1366 and larger, so it's just UI bug.

Yeah, it looks like the width of the inner container was set to be the same as the outer one, but padding wasn't accounted for. It's really not a big deal.

All I have to say is Uber has made decision not to support 4:3 monitors as per this knowledge base article.

They only state they don't want to support 1024x768 and Scale UI mod fix this just fine anyway.

They set the minimum resolution to 1280x720 as a consequence the minimum aspect ratio is set to 16:9 for the simple fact that 720p has an 16:9 aspect ratio.

Edit: Not officially supported but yes it can be done through mod.

The missing "Resume Game" button is an issue the team is currently working to resolve.