while i 100% agree with you that our demo (hi! i'm author 2/2 of this software) should just log you in without asking for credentials... we're 100% focused on the product right now, and being near the top of HN was a huge surprise to us as well.
we are working on ironing out the UX of our site (it's a single column of text, that we whipped together in an hour, so we could focus on building the software). so it's completely a work in progress at this particular moment.