Yes.  You can rename your pages so they flow in the order you want.

This example assumes you have 3 pages in your Project: page1, page2, page3

You now want page3 to be the First page followed by page1 and then page2

In the Command Centre, type the following and hit Enter/Return after each one

rename "page3 "pageA

rename "page1 "pageB

rename "page2 "pageC

Page order is prioritized by alphabetical order.

Make sure your Project is saved while you are on the Page you want friends to see first.

In this example, make sure you are on pageA as you save.