8.5/10
Simon's a little too inscrutable in the wrong ways to have me fully buy him as this super mastermind. If I'm remembering it correctly, he could have just done nothing before E2-4 and things likely would have gone his way in the end.
Otherwise, this is a pretty high rating for a case I remember pretty poorly, but I did quite enjoy it at the time.
"One toot on this whistle will take you to a far away land."
-Toad, SMB3