Comparing Main to update-game does not provide a create pull request button

[CCSNH-NicolePhillips]

Following the steps comparing main as base and update-game the 'Create pull request' button disappears and is replaced with the following text...
There isn’t anything to compare.
main and update-game are entirely different commit histories.
Underneath we can see the changes. My students are hung up on this project and so am I.
Please advise.

[sinsukehlab]

I can see the Create pull request button though. Could you attach a screenshot or something?
CCSNH-NicolePhillips/skills-review-pull-requests@main...update-game