Fun demonstration of transformations, I had to read the comment on the main page to figure out that I was supposed to drag the dots at the bottom, but immediately felt silly when I saw them light up when hovering over them lol.
In it's current state, I wouldn't say it's an exceedingly engaging game, but I think that's alright. I think you could lean into that a little and make it an educational tool.
Admittingly transforms are a bit alien to me, despite loving linear algebra I've avoided learning too much about what engines like Unity and UE mean when they call something a "Transform". I know that they're a powerful way to store positional and rotational information, and can even be used to represent objects with more than 3 dimension, but I don't really know how.
I'd probably pay some money for a tool that educationally explores Transform operations in both 2d and 3d