Pretty simple. I was making it out to be harder than it was at first. Kind of hard to see the bills on a smaller screen size but I guess that might be part of the challenge?
Viewing post in You Only Leave Ones jam comments
Thank you for playing. The game being simple is by design. The challenge is to train your brain to quickly extract specific images from a larger set of similarly looking ones.
I do share your preference of a larger screen for this game. But it is playable on mobile too, and some people, interestingly, prefer the mobile version.