Fun! A couple of minor bugs. First off, I get a lot of duplicates. You can fix this by using List::Util::shuffle. (In which case, you should srand; at least some versions don't do that for you.) That will make you get each thing once, if you use it right. Of course, that means that it gets less random as you go, but more interesting.

Also, the re on line 70 should have a /i modifier; close in purticular uses a form of close at the beginning of a sentance often.

Oh, and time for me to show off:

16 answered, 15 correct = 93.75% correct
0 extra hints used = 0 per question
Thanks for playing!
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(But it was just a run of good luck.)