Nothing, on my end. This is a static site — plain HTML, CSS, and JavaScript served from a file host. There's no server-side code, no database, no analytics script, and no ad network here.
Some games save your progress — high scores, upgrades, streaks — directly in your browser using localStorage. That data:
Whoever hosts this site (a static host like GitHub Pages or Vercel) may keep standard server logs — IP address, browser type, timestamp — the same way almost any web host does. I don't have access to personally identify you from that, and I don't use it for anything.
Links off this site (like a donation link) go to other services with their own privacy policies. Once you click through, that's between you and them.
If this policy ever changes, this page will change with it. No notifications, no email lists — just check back if you're curious.