The prototype for my new browser game is live!

Help me choose what feature to implement next in the comments:

1.  Split challenges into separate levels to teach them to players (tutorial-like)
2. Implement the "Manual focus" mode
3. Implement the "Night mode"
4.  Animate facial expressions to match the mood bar
5.  Keep counting against the "annoyed" score if players keep hovering on an fully-annoyed person
6. Implement a visual feedback system for when a person becomes fully annoyed
7. Implement an "Eyes open"  requirement and a blinking eyes animation
8. Add a small delay to the camera shutter
9. Secrets: Implement unique people which modify the crowd's behaviour if clicked on
10. Implement difficulty settings (camera's size, crowd's speed, crowd's mood)