The mini games would most certaintly be a nice addition, but just make sure they don't interfere with the gameplay. As I commented before, the paperbag is already pushing it... if you do make a mini game, it should be an ability able to be casted with a cooldown- or somthing like that (using the units sold option under object editor would work nicely). Then it's an optional mini-game that doesn't interupt you, but it have a set cooldown so you wouldn't be able to use it constantly.