It's not lag - you can tell because of the super responsive hover...it's just...really really slow. Why? Was this a design choice? No joke, its a neat idea, I wish it was better, would totally joint he design team and fix this just so I could actually play it...Its a neat idea broken by the 30 seconds+ wait between the opponents turn and yours.
I think this game is really great but I think it could use a bit more int he effect side of things. I often feel like if the opponent starts first, the only way to win is by disabling them or trying to deck them out. But this is not neccesarily bad, its just something that takes away fromt he fun because any strategies you could have planned are kinda pooped on if they go first and have an aggressive attackign deck.