According to their twitter, the 21 chain limit is a temporary thing to help since their server is being majorly overloaded. Once they can upgrade and implement accounts and stuff, you'll be able to see all of them that you've done
I was pleased with this one that I got the first prompt on
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(10:17:09 PM) Ed Bellis: i think pac-man just keeps repeating, for instance
(10:17:26 PM) ertyu: ya well tell that to billy michtlle