This site is a new one to me and I know just the people to ask how good or otherwise it is (I haven’t really tried it yet) ...
Well ... it’s fun.
It’s not all about etymology, though. Some of it is about meanings.
I got 6 out of 10 ...
Some it is quite interesting. Admiral is related to the Arabic “amir”, not the Latin “admirabilis”. Huh.
It has serious problems. The first tip off was when it said mustang was from Tibetan. Some of these are so far off that to call them “wrong” is an insult to those who are wrong.
Note that the quiz changes each time it’s accessed. The examples of errors already noted are probably endemic.
I gotta go study!
(my Algonquin needs brushing up; my English is beyond human aid)