Add option to mark capital letters and special characters
It would be useful to have an option for answers to be marked as incorrect when you miss a capital letter, or don't use a special character when needed. For timed practise, since these letters often take significantly longer to type (around a second, compared to less than a quarter of a second for normal letters), a slight time bonus should be given when these are done correctly.
Naturally if these were marked, people would get into the habit of getting them consistently correct, which would be useful for writing when actually using the language in the real world
This, and also, not capitalizing words before you select them. You can guess a LOT of sentences just by noticing which word has a capital letter. It makes it significantly easier (too easy...)
I've found that to get my XP's done for the day that it takes less time because I now do not capitalize; I usually put in the umlauts though, but I know in my head that the nouns are capitalized. I gave up on timed practice a long time ago. I was never able to get through a single lesson when I was being timed.