A restart level option would be nice, at least when doing the time trial, so that you don't have to go back to the start menu each time you mess up. But still, a great game!
Yep, so I got the powerful gun, got my trusty sidekick, and I'm on level 20+... So now what? Where's level 2? Surely if there are zombies in London, then this isn't the only street corner where I could be killing them? :)