Really nice! I noticed however that the verification email that gets sent to you after you register has the name/address of 'webmaster@local' rather than <username>@projectlovelace.net.

Speaking of registration, it would be nice if we could log in using our Google accounts (ie. Sign in with <service>), rather than make another account with your site.

Also it would be nice if the site picked up your preferred language of choice after you've done at least one of the problems. I like coding in javascript, but I have to select it from the dropdown list each time I go into a problem to solve, and sometimes I forget to do so (defaulting to Python instead)