I liked this a lot! I think it's a great solution for the short span of a game jam: probably not an idea you'd develop farther than this, but it makes for a pleasant short experience.
Only thing I'd add: you mentioned the mouse smelling the cheese with "that little nose" of his, but then you basically wander around aimlessly until you stumble upon the cheese by chance. Maybe adding a hint mechanic that points you in the general direction of the cheese would fit that dialogue better.