the concept of the game is nice and well developed, but still i don't think that the design of the site does come up to the content. so i tried to improve it a bit. i haven't come that far till now but i already made a suggestion for a new card design. you can habe a look here:
what i have changed is the following:
_backgrounds of the cards are white for common, silver for uncommon and gold for rare.
_colors for recource costs:
no cost (white/no color), bricks (red), recruits (green), magic (blue), bricks/magic (purple), bricks/magic/recruits (brown), and so on ...
_icons for the recources
_some typographic changes
_card lenghts are now all the same
well, i really would like to help to bring the site up to a next level