Hi Celina, nice to see you here 😀
Basically these diamonds-gems show the number of completed lessons. It is also used in our leaderboards.
Maybe we could do something more with them? Like giving people badges depending on the number of gems or treat it maybe as a way to pay for something like online lessons.
Do you have any ideas what we could do with them?
Just a suggestion but I would like to see the diamonds somehow reflect the accuracy of the completed lessons without making incorrect choices.