Thanks for the review!
We tried to make the earlier waves slow enough that you had some time to figure out what you were doing while also not being too slow for players who already had experience. I think in a perfect world we would've had way to speed up the game play loop but we couldn't quite fit that in within the month.
We probably could've made it clearer that you had to drag the cards to select them, I guess it's good to know for the future.