I'm not the dev BTW.
Just unofficial tech support.
The game does need some polish.
Act 1 stuff was made over two years ago.
But Arc (also known as TheArcadean, sole dev of the game) doesn't really have time to spare going over and combing what he's done over and over.
People get antsy if they don't get new content.
So all sorts of polishing had to be pushed down in the list of priorities.
Tho I guess this conundrum could be fixed by just hiding the "use control" option after the second event.
I still don't know why he leaves it in spots where you never use it, like on Morgana's place.