This is is definitely one of the most original games I've found, and the style really suits it. But I feel like the design of the idea could be improved. I ended up just clicking on random people to find each and every Ivan and take them to the person in white. It would become much more interesting if you could make the various hints actually necessary. Maybe there is a single Ivan but some of the other people lie and you can identify them, and instead of physically find him when the time is up you review the info you gathered and chose among a few options based on the identikit you created.
Take this as a constructive feedback, because I really did appreciate the idea and I feel like it could be even better.