• I started with the app logo at the upper left corner, and decided to add some important links at the top right corner.
• I've decided to use the big, bold and recognizable "404 Page not found" as the headline, and keep all of the copy at the left side of the screen.
• Despite this being a moment of mild frustration, it is not as if the app wasn't working. I decided to go with a reassuring and calming tone, assuming that this is our fault – but there's a quip with the "stillness", I hope this makes the user smile.
• I have decided to use some of the power words throughout the copy, to stay on brand, but I did my best not to force them into the sentences. For the CTA, for example, I've chosen more direct copy.
• For the illustration, I think it would be nice to have a drawing of a person being interrupted while meditating – maybe with one eye open, looking sideways, missing their focus.