I quite like the cards, the low saturated setting and the somewhat unique style they give of . However the colors and the style of the game and avatars itself seem a bit to flashy, shiny and cute to me personally. It feels like it is two different worlds are mixing - the former being more mature then second being more fresh and youth like. If I had to give an example in terms of target audience - mixing Magic the Gathering with Zenonia or even more extreme - Animal Farm (just as an example).
It wouldn't have been to bad to see something different to the usual in the game world as well instead of just the same old thematic that repeats itself time after time especially since the cards have such an unique design! I was kinda expecting something like the tron world (just an example). Yes you can mix absolutely different worlds if it 's a game in a game but that doesn't mean it might still leave a shallow feeling behind it, like you were to scared to follow an unusual attempt or were trying to much to into two directions at the same time.
That goes without saying that 's only about the overall art-style and feeling to it - and not the gameplay itself.
Looking forward to trying it out anyway.