I wanted the second to the last pink female as my character but when I selected next it selected the male version next to it. So I went back and selected the green female instead. Will I be able to select a new character at a later date?
Not sure what would've caused your selection to go haywire like that, but I'll take a look. In the meantime you can customize your avatar to your heart's content from the main page. Just go to alpha.glitch.com, log in, and select "Design your avatar" under the Enter Game button (which is currently covered by a "We are closed" sign).