Chests make's sense! I don't know how I missed adding a chest to a dungeon tileset! What is a dungeon tileset without a chest?! I'll try to fix that this weekend. :)
As for animations - I though they'd just move 1 pixel up and down, like in the old times. If I ever update the tileset with animations it'll be for all of the characters too, not just one (because consistency). Animation it's very time consuming (even for such a small scale) so it's unlikely I'll find time for that anytime soon.