Oh, I see
For each page, you should look for the main message that the page is trying to tell. You did it well for "First date" since the page focuses on their first date.
For "Game...game...game..." I would say that the focus of the piece is the mother worrying about Nova and Max's relationship, and Nova's reassurance to her mother is the final, lasting image we take away from the page. So I would suggest something like "Reassurance" as the title for that page.
I would argue that you shouldn't have the ellipses (the triple periods: "...") in the title, since they're mainly used when a sentence is broken. Titles are standalone pieces of text, so saying "Woo!" (like how Max yells it) instead of "Woo..." would make more sense. Plus, they are, emotionally, pretty depressing punctuation devices.
You would want to focus on the emotional soul of the page: How should the audience feel about "Sappy cartoon...XD" or "Family?" Titles are supposed to encapsulate that into a few words. (Which is what's so tricky about them)
Hope this helps