Update README.md

Update README.md

fix

cleanup

fixes

colour fix

Delete assets/backgrounds/Vikingstagram-logo.png

Delete assets/backgrounds/Vikingstagram-nobg.png

Delete assets/backgrounds/Vikingstagarm-logo-transparent.png

Delete assets/Goosebumps.mp3

Update progress.js

Update about-us.html

Update about-us.html

Update puzzle-4-script.js

puzzle 6 and accessibillity page changes