Really great game! Fitting 3 minigames in a Trijam game is genuinely amazing. (And each one has its own special mechanics is exceptional)!
I don't have much to say about the art except for I am genuinely amazed. (I've played some of the Trijam games made by other students from your game design course and every one of them had amazing visuals)
Polishing could probably be a focus post-jam, but that isn't necessary. For a first game this amount of polishing is great!(uhhh for my first one I didn't do any)
Great job!