Who makes these
I'm James Jackson, a former teacher who now works as a QA engineer, and I make these games for my own kids.
It started with me wanting to teach my son his letters in a safe interactive way. I knew it would be easier to make my own games than to find something that held up to my standards on privacy (especially when it comes to my kids).
Then a family member saw my son playing a game I made and was interested for his daughter. I put it on a web app for him, as he had an iPhone and I was using Android. Then I decided to use my own hosting and domain, and here we are!