Well its a premature rating but the first impression was nothing short of awesome. I mean the build is clearly under development but its still polished enough to be release worthy.
The only annoying bug I encountered was that some images didn't respect the frame view settings. Even though all of them were similarly sized, few would still render at a bigger (meaning out of the screen) proportion. Readjusting the frame size fixed it though.
Love the rich options and the status views. You really have a knack about UX composition. If you have some kind of github/gitlab/bitbucket issue system, do reply with it. Communicating over email isn't really that efficient.