I don't collect or share any personal information about anybody. I don't collect names, addresses, phone numbers, e-mail addresses, IP addresses, or anything else personally identifiable
Even if you enter your e-mail into a registration dialog, that e-mail isn't saved or stored anywhere, but is only used to generate the registration code and then gets
immediately forgotten. If you enter your name in a game, your name is stored in a cookie or
local storage on your computer's browser cache, along with which level you were on in the game, so you can resume from where you left off the next time you play.
I do use Google Analytics to keep track of my visitors, but only in a very general and not a personally identifiable way. You may opt out
of Google Analytics by installing their browser plug-in if you choose to do so. The information I get from Google Analytics is: how many visitors and page views I
got on a certain day; where those visitors were from (country, state, city); which operating system (Windows, Macintosh, Android, etc.), and which browser they were
using (IE, Chrome, Safari, etc.). I also get some limited information about how the user came to the site, e.g. was it a referral, a google search, or did the user
directly enter the url in their browser address bar. If it's a referral, I can see which sites are referring visitors to mine. If it's a search, I can see which keywords
were used to bring my page up in the search engine.