WOW, THIS GAME IS SO MUCH FUN!!! This has been my favorite game that I've played so far! Super creative concept as well!
My singular issue with this game is that you can't go back after you start choosing categories of ads to send. If this is intentional, then fair enough because it definitely ups the difficulty.
The only thing that feels off with this game is the theme, if the AI was involved more somehow in the game that would help. Like maybe the AI highlights keywords for you if you click an "AI Help" button.
One small quality-of-life change would be to make it more clear when you perfectly send an ad or how much you screw up sending it. Maybe have it be very green if it's perfect, then yellow if mid, then red if bad. Also, the "time added" text being red made me feel like it was a bad thing since it was the same color as the time "speed up" text. Maybe change the "time added" text to a calming blue.
I'm obviously nitpicking, but that's just because your game is so good!! :)