I've had, multiple times, cases of my gold income suddenly massively reducing. I haven;t lost any settlements, I juts go from like +30 to +40 down to +7 or something!

after a few turns on the last mission of the campaign I press next turn and get stuck to a point I need to restart the game.. continue the campaign .. and still stuck in the same spot. running on mac

Is the Roman Empire in the game for us to fight?

Yup. This is new: on my older Macbook there was no problems with Custom Mode (aside from the old lady being slow and heating up a bit.) On my brand new laptop it doesn't get past about turn 15 them freezes, necessitating a force quit. Note: the new laptop is a Windows machine and there seems to be no new issues with Yield when playing Campaign. Just to check, logged in with the old Macbook: no problems in Custom Mode (aside from more laggy and more heated up than I thought.)...

At the beginning of the tutorial, at the second window we are asked to select the sheep. When selected nothing happens. I've repeated the tutorial and this happens each time.