Hi venemo,
two satisfied users here, too.
As far as text selection, formatting (ref. is to bold and strikethrough ideas) and so on are involved, an idea for the UI could be to use 'modes' a la 'vi editor'
I mean, when you double click on the widget, the widget could evidence himself (and all the instances), so intercepting all the events instead of leaving the desktop able to do so. This way it will become possible to select text with fingers or stylus, CTRL+C CTRL+V, ETC.
While in this 'edit mode', the bottom menubar will be changed or customized by the user, with a specific button to exit the editor and to go back to desktop system. You could also add a top bar to move notes around the desktop or to select which note should appear over which other if multiple notes are shown... Don't know what could be doable and how much effort could be needed, but it's a brainstorm.
Thank you for the app anyway, something like that was really needed!