Save and Undo have been available as single key commands in computer programs for decades now. Why aren't basic key commands like Save and Undo incorporated into the app? This is a computer app, not a toy (isn't it?).
(note I've moved this post into 'questions and answers' so we get notified of updates here!)
Version 2.0.1 is now released which has ctrl+s save back
'Command+...' has been found to be replaced by 'ctrl+...' in some circumstances. This, along with the Cut Copy Paste commands, are with development now.
I hope that helps