Also, another UI note. I think the cumulative total of stars per card played should be much larger / more prominent (and perhaps displayed beneath the void info, rather than beside it).
I find my attention is currently caught by watching the cards trigger in the centre of the screen, so I'm missing the cumulative total completely. Its hard to break the habit consciously when this info is so small - as its the primary game score, it deserves to be far more visible.