The problem with this fix, unless I am mistaken, is that without the ability to jump upwards and teleport to the Offy, there is no way to escape from the top platform of the Watch Tower other than by entering an infinite death loop.
Unless you extend your newly lowered platform laterally towards the right of the screen and allow Willy to jump into the Belfry (see my post http://jswmm.co.uk/topic/76-new-jsw-2015-bug-fixed-edition/?p=354).