It's been a while since I played, so I'm working through the tutorials. This game is so impressive! The gameplay is slick, and the UI is smooth as butter.
I do have one minor UI question, though. I know I can open the Menu by hitting ESC, but is there a hotkey for closing it? ESC doesn't seem to do the trick. It's not a big deal, but I love hotkeys. Which is one reason I love this game -- there's a hotkey for just about everything.