I just completed Transistor.
It was awesome like Bastion, I highly recommend it and it's a must have IMHO.
Plays wonderfully on both iPad and iPhone.
But that said, I must confess I liked Bastion more, despite Transistor has better gameplay and even the setting was better to me.
But it's really too easy....I died like 3 times the whole game and once in the final battle.
It's much shorter too.
But my biggest gripe (not really...it's an awesome game) is the story...which is super cool but even after completing it...it remains too vague IMHO.
Bastion one was vague too...but after you complete it you have a clear idea of what was going on and you knew everything about each character....here...not...it's too vague after completing it (and yes, I've read all the bios trying all types of power combinations).
Still great...but I wish they explained a bit more the place, the story and the characters.
I do not think they will explain anything more...But I didn't complete all the challenges in the sand sandbox