Any solution to this yet? I know where the shop is (in the first area after the box) but it is not showing that my challenge has been completed even though I did it three times (dodged the rocks). Is this a bug?
Better yet ... is there a cheat code to get the UnCredits?
I don't know, I got the UnCredits as expected. About cheating them, bsdxlr8r pointed out a way to do it.