Explanation
I think you only have to drag the first card, and then left-click the other four. It's been a while, but I think that's how it goes.
It's still dumb. You should be allowed to click Discard or Keep and then left-click the order. Dragging anything anywhere is a pain. It makes Watchtower loathsome.
Nice that he Good Guy Gregged it back to you, though.
Oh wow, the meme was posted before this game was even finished?