[culi]

If this accepts Firefox and Safari then it could be a great addition to "intro to web dev" tutorials

CSS Flex https://flexboxfroggy.com/

CSS Grid https://cssgridgarden.com/

CSS selectors https://flukeout.github.io/

[lelandfe]

Same creator as the first two, Thomas Park. Looks like he's started a series of these, but they're all paywalled except those three: https://codepip.com/games/

[culi]

The last one is actually independent. But you're right about the first two