Woah, this thing is firing on all cylinders!! What an incredible design for an RPG combat system. It is so concise and effective, hitting that perfect balance between planning, execution, and tactile feedback. Having a system like this in a pokemon or dragon quest style RPG would bring those style of games back to life for me. And the presentation too! A variety of beautifully animated enemies, super snappy UI transitions, interesting decision that are presented with crystal clarity. I'm really really into this, incredible work!!
p.s. I had that menu issue that you mentioned but zooming out a bit in my browser resolved the issue :)