Doesn’t save progress if you leave in the middle of a round. You can come back and complete it, the city will show completed, you get the payment, and then the city shows incomplete once again.
Tokyo, the 6th egg was glitched. I even used the Help to go through step by step and it just finished with an incomplete pattern and still wearing the mask and hat.
It would be a more interesting challenge to have limits on the amount of dips it takes to get the right pattern. And then like a 3 star or higher money award for a perfect dip, and lesser for errors and multiple unnecessary dips.
Also the ads are not only annoyingly the same game, but too long until you can pass them.