+ sign is to choose a profile picture, which also changes the background of the landing page. The circles within the text fields are color confirmation states,

+ sign is to choose a profile picture, which also changes the background of the landing page. The circles within the text fields are color confirmation states, turning green when the string you've entered is a complete name, email, etc. Thanks for bringing to light the shortcomings of color confirmation; we should have text confirmation states instead. Sorry about the confusion! I'd love to walk you through things if you're up for it. Just shoot me an email at mike [at] volleyit.co