I agree completely with the dice not being implemented in the best away. Having the questions themselves not really affect how much the sus-meter will increase sort of can ruin your game if you get unlucky with the rolls. For example, I've seem some people go for not-suspicious questions because they think it'll help them, and then at then at the end they have no information to decide who the criminal is so they end up guessing. If there is one thing I should take away from this jam, it's that I should think things out more before I start working. It was my first Game Jam though so I'm glad I actually finished something. Also, while working on the game I started referring to the meter in code as the sus-meter so it was easier to type out :)
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You never know where a game will end up. Especially with restrictive time limits you have to go with the first idea that comes to mind, even if it's not fully fleshed out. I'm honestly impressed by the polish of your game, and this being your first jam makes it even more spectacular. You should be proud of your work!