Like changing all the wires in the furnace room. How should I know which ones to change?
It gets worse...
Game needed a few more programmers: for example you can't just select something and use it, you have to move your character beneath the target for the click to count, there is no "instant-screen-change" if you doubleclick on a location which does exit the screen,...
Also, for a game requiring you to do actions this precise and complex to suceed, the progress is just too unsensical, meaning, you don't know what the fuck you should do until you did it.
Artistic side is jaw-dropping, however.
Good example of a point and click from the past.