Hi,
I would also really appreciate having a pause feature.

Clicking a button should pause the game, and clicking it again should resume at the previous speed.

Personally, I would probably reassign the "Backspace" key from "back to x1" to "pause," since I don't need the separate "back to x1" button.
By default, you could map the pause feature to some other key.

Hi. Why do you even need a pause when you can just use "esc"? But anyway, I will check what I can do.

do click on stuff or change some circuit in pause.
The same like in the Map Editor / Time menu