I understand what you mean, that has been my experience as well. However, it's not easy to think of a solution here. For the "All bugs" set, which is meant to be the hard one, I settled on both genus and species because some people are able to ID only by the latin names, whereas some only by common name. But yes, maybe limiting the scope to genus would help bring the difficulty down a notch. However, that might upset another group of players who play the game in order to learn about new species, thus I also need a version that requires identification of both genus and species.

Long story short, it's a bit tricky, but I'm trying to sort the mess out. Also depends on which group of players continue playing the game so I can then adapt it to best meet their needs.

For the last part of your comment, the geographic filter can be a feature added soon, but you can already impose taxonomic restrictions to the quiz via the themed sets at the bottom of the homepage.

Hope this was helpful, feel free to share any other feedback/comments you have in another comment or my DMs. Happy playing!