This was really fun, although I'm kinda disappointed that Rarity was just a clone of Twilight. Throwing gems could have been her projectile, but I dunno about the special moving ability.
If there was a difference between Twilight and Rarity, I didn't notice it (Her attack could have been whining).
Not that I'm complaining, I'm thankful for the game. Though if I can be a bit nipticky, I don't think Iron Will qualifies as a bad guy, just contrast how he accepted Fluttershy's reason to not pay him and how the other pony sellers treated her at the beggining of the episode.
I like to refer to the game as "Friendship is Amiga". Get it? Amiga is an old game system and spanish for...
I wonder if, since Cadence relation wih the Crystal Ponies seems to be related with the "Crystal Kingdom" from the toys, if these Crystal Ponies are going to be toys themselves; just like the last season finale was meant to promote Cadence toys, this season premiere could be meant to promote Crystal Ponies... either that or the semi-transparent ponies from the blindbags.