I'd like a game that triggers people who are sensitive to criticism so they will get upset. Preferably criticism that makes them feel rejected. Stuff like, you failed, you're a loser, no one likes you, you made another mistake, you're stupid, etc.
The reason is that sensitivity to criticism is often due to classical conditioning. People get upset because their mind associates criticism with rejection. If people are criticized enough times and don't feel rejected, it can help break that association and make them no longer sensitive to criticism. That's what worked for me and I'd like to help other people who may not be comfortable seeking out criticism from people and learning how to think about it differently. A game seems like an ideal solution.