You have a pretty dark setting, which is very well done into the game. The graphics are "simple" but they fit the game just right. Even the soundtrack is perfect with the game. However, I think your gameplay sticks more than your story. I'm not a tactical games player, but I was so focused on trying to make the best moves that the story was passing me by a bit. Maybe if in some moves, or when grabbing the pieces, the characters would stop and talk, instead of just having the text on the right, it would make the story stick out more.
The characters abilites are interesting, even though I did not get to use all of them, but they work well together.
I think you have a good foundation for something bigger.
As I said before, if you can make the story have more focus, then in my opinion you can create a good narrative game :)
Narrative Game Jam #4 | Sponsored by the Southern Illinois University CoLA DHL » Entries » The Perishable