I'm not expecting you to rewrite the game or anything lol but personally I think it would be interesting if instead of simon being explicitly evil he was in denial. Having it be implied he killed his family by accident and is kidnapping people to force them to fill the roles, freaking out and killing them by accident again when they don't play the part. I think it would also work with forcing them to do chores and the line about his room "not really being messy, just what a child thinks a messy room looks like", him trying to pretend everything is normal as another form of denial.