No.
There is no reason to not allow Shabbat.
No, that violates the Shabbat.
Yes.
No, sewing is one of the activities not allowed during Shabbat as we are not supposed to create on the day of rest.
To my knowledge, round challot are allowed on Shabbat. They are traditionally used on the Jewish holiday of Rosh Hashana, when we celebrate the new year, but are not limited to that use.
The question answers itself. We're allowed to play monopoly on Shabbat because the money is fake.
yes i think
Yes, even on Shabbat.
Yes only when Shabbat is over. For conditions of life and death, it is permissible to do "work". For example, ambulances still run on Shabbat because people could be seriously injured on Shabbat and need medical help.
Anything that is not one of the 39 forms of forbidden creative work.
Yes, food can be warmed during Shabbat. It can't be cooked from raw though.
There is no limit on how many you are allowed to make. However, you must have at least 2.