Jackie beat me to it! Thank you, Jackie.
Zahra, I was a little ahead of schedule because a former colleague of mine had recorded the audio for a section of an earlier piece I wrote that ended up being cut from a deployed course - so I had some audio content available. I had been toying with the architectural / blueprinty feel for a while, and the idea came together. I work a lot in PhotoShop, but for this challenge I used PowerPoint for media. The character set can be found online. I pasted each photorealistic character into ppt and used Artistic Effects > Photocopy - and recolored to B&W 75%. I then copied that image and re-pasted (essentially resetting those settings while keeping the output) and then used the "color" tool to apply the blue accent color. I used the same process for the background images.
The background room audio can be found online. I used Shutterstock to source a lot of the non-character images, and the sketchbook feel came from native shapes I added in SL. I used the fonts "PW Scratched" and "Roboto." I also relied heavily on an icon service I subscribe to: nounproject.com. They've been an indispensable resource for me for years.
I hope this helps some!