Bastion is a game with no big flaws, but it is also a game that doesn't do anything particularly impressive. It has functional combat, but its not particularly interesting. The visuals look alright, but aren't that great. The story has some interesting ideas, but there's not much to it.

The most interesting thing about Bastion was its narrator. He added a lot of important context and spiced up sections that would otherwise be very bland. The reactiveness to different actions you could take over the course of the game was also good. He was also used very well in the overarching story.

The game has a lot of different weapons available, however it actually feels like there's too many of them. Bastion is a very short game, and with the amount of weapons available there's no way the majority of them will get a significant amount of use. You also can't preview a level before traveling there, so you won't know what weapon you'd want to use for a level before you go, and although there are occasionally opportunities to change weapons mid-level, they're very rare. Since weapons are also upgradeable, you're even more encouraged to use one set of weapons throughout the game, as you won't have the resources to try anything else.

One of the game's gimmicks is that the level assembles/disassembles itself around you as you progress through it. This was introduced as a way to easily tell where you're going, but I had the opposite experience. Being unable to see the path ahead of me until I got close to it made it harder to progress, and I would frequently have to resort walking in a circle around whatever island I was currently on to try and see where the next bridge would assemble itself at.

Overall these aren't major flaws, and the game has stuff going for it. The narrator is good, the music is very enjoyable, and while the gameplay isn't great or very impressive, its fine and hard to be bored by. Maybe Bastion was more groundbreaking back when it first came out.