Japanese Lesson Bugs
I think it would be very beneficial to fix the number portions of the japanese language portion. When you're asked to match the kanji to the number it basically shows up as Select translation for "Four" with the number 4 being huge and blue. the kanji is tiny beneath it. This doesn't foster learning so much as accidentally getting the answer right, since before you can even see the kanji you see the correct answer. It's a big hole in the design.
I totally agree, I felt like these exercises were a waste of my time. Matching Kanji to sounds = good, matching a known number to a Kanji or sound chosen from a list = good. There are plenty of ways to teach this, no need to result in something silly like the examples you gave.