Love the idea, one of the few extensions I would install and I did. Unfortunately first the shortcut didn't work because I'm on a mac and I had to use the command not control key. Then the animations on keypress just we're too cute much for me. I want a text editor and I realized I always have one open anyways and that's where I will continue to do so.
I suggest adding options for any flare like animations and perhaps some basic themes like this one[1]. Utilizing the new tab screen is a great idea.