No, it is definitely not supposed to look like that. Here's what it looks like for me:
https://s3.amazonaws.com/uploads.hipchat.com/23744/150541/nk...
Do you mind sharing your video card info and operating system? It will be hard to debug remotely, but I'll see what I can dig up. Please post it here or on github: https://github.com/brianchirls/Seriously.js/issues
Thanks