Wow. Just... Wow.
This is amazing. The sprites are awesome, love the musics (got all that Eurobeat myself), and everything else is just perfect. Could be better, choosing which pony you'd wanna be (maybe even making your OWN pony...), and minigames are obligatory, but otherwise this is very well done. 9/10 because it isn't done, but it's still pretty damn good.
On a side note, you should make Derpy trying to put a muffin into a door mail slot, while eating some mail. It is Derpy after all...