I had a good moment, trying to remember all the stuff I learnt... a long time ago! Proud of a few things, and contrite on others :)
Very nice to give a little illustration.
On possible enhancements:
- I find the font difficult to read.
- It would have been really nice to be able to buy hints, to help lazy memories
- and a "pass" option, so I don't have to test blindly when I don't know
Thanks for this little interesting and pleasant moment