It'd be brilliant if you could ever add something like "always win minigames" since those can be so frustrating you must close the game immediately so you can get the extra +10 in empathy, say.
Also, though I think it'd just be absolutely impossible, it would be fantastic if you could modify the minigame's rewards so that it starts giving +40 points all the time and notebooks. Coins are only useful when there's that event that looks like a 4x4 lotto, anyway...