This game is XBLA's 'Bastion'. This is a fairly quick no-deaths all-idols run through the first of Bastion's three survival levels. This one is called 'Kid's Dream'. If that means nothing to you, this is 20 waves of enemies with all difficulty-increasing idols activated (they're like Halo's skulls). I put the idols at the beginning so if you were curious (and literate) you could see what their various effects are. This is a very advanced save so everything is unlocked and maxed. Fun game, especially once you start upgrading your weapons. The second playthrough is even better because you're unstoppable.