For a player that doesn't read changelogs or watch development and just went off what they'd see in gameplay, they'd see:
- Two new boob items.
- A bubblegum fetish item.
- A blueberry+bubblegum fetish item.
- The boombox for more music variety.
- Lobotomies (I'll admit I forgot to read what this does.)
- A medkit to help make popping more convenient and speed up CW grind.
- One boob-related "food".
- A bunch of new characters (mixed).
- Three new backgrounds.
- A whole new sandbox mode.
- A whole lot of belly creaking.
- Bug fixes.
Realtalk, if it wasn't for the update being called "Titty Update", I'd bet you wouldn't have noticed the new boob content enough to bother making this comment.