The crew at the Sherlock Holmes themed escape room in London posted a couple of photos on their instagram. Squinting at a tiny screen didn’t work so well for me, so I had to try and make an interactive version. At first I used regular old hotspots, but then changed to using shapes so that I could highlight the object after it was found. I didn’t realise until now that a shape with no border and no fill could still be responsive to clicks.

I used a giant hotspot underneath all the shapes, so that the cursor switching to a hand was not an extra clue.

Apart from Spot-the-Difference, this setup could easily be used for hazard identification etc.

The sparkly noise when you locate a change is from Freesounds.org https://freesound.org/people/Soughtaftersounds/sounds/145459/

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You see, but do you observe? Someone's been rifling through our things at 221B. They've tried to put everything back as it was, but we've identified nine differences. Can you spot them all? #TheGameIsNow #EyeTest #SpyTest #Sherlock #EscapeRoom #221B

A post shared by Sherlock: The Game Is Now (@221b) on Mar 16, 2019 at 9:19am PDT