Examples look a bit old school, I would use more "up to date" designs.
Some inspiration: 
http://www.lovelyui.com/
http://pttrns.com/
http://www.mobile-patterns.com/
http://h5bp.github.io/Effeckt.css/dist/ (this one is more about transitions than UI)

Would it work on all types of devices?

My account deleted. I try to login and It said that e-mail doesen't exist...

I played around the other day with this, thinking it was really cool, but not thinking I would be coming back. You know, like any other cool thing you see on the web really, but I've been back like 10 times already. Its just helpful to be able to just play around with a component in its own little environment really quickly outside of a project.

Great stuff. Thanks!!!

I tried do to the radial background gradient, farthest-corner, 20% x, 50% y

the code for this doesn't seem to appear in the output :/

Thanks for the great tool otherwise!

I can't seem to have a 'default' font, and so every time I prepare my CSS I have to remove the font property because i prefer to have it inherited...
thanks

remove position: relative; for .view

Adding outline to the 'Border and radius' section would be nice, there are a lot of killer transition effects that can be achieved by combining border-radius, box shadow and outline all together.