I know what a hard job Japanese team does, but don't you think this is a little of difficult when they give you new words in hiragana and the hints are in kanji..?

教科書を三冊買いました。

Is it just me or does it read the "satsu" card as if it were a small "tsu" when clicked? The lesson also ends prematurely.

It's a tad hard to do this without having a hint on the counter for papers (satsu)

Why is it wrong if the counter is before the subject, and why is it before the verb???

Wow, I think this just marked me wrong because I didn't put 三 in kanji...