That's very fun game. First run for me was just a pure random, cuz I didn't understand any of the cards, just got that ROI gives you raw points. I was completely lost, but give it another chance I accidentally discovered that I can click on a card so tooltip would stay and I can actually read description of the effects. Would be much better to have effect text on the card itself instead of clicking and reading tooltips.
Well done, I enjoyed playing it.