Rated 3 out of 5 stars
This is a very nice editor that is easy to use and gets the job done in a simple fashion. Though I prefer a standalone app with more options, including opening existing apngs, but I'm sure it will get better with future updates. Nice work. :)
I found a nice standalone editor that does pretty good. It's called Japng. It was made in Java and you can find it here for anyone who is interested: http://www.reto-hoehener.ch/japng/
I can't wait to see the future of this new format and hopefully see the horrible format know as gif fade away silently.