Really nice idea, and the UI is super clear. Maybe I'm missing something but when I open a pack it looks like one of three cards flies off the screen where I can't access it? Other than cool concept!

Cute idea, the music and sprites are very nice. Good job.

Nice visuals, art was nice and the audio was good. Was kind of hard to understand at first, but I got better.

GG

Very interesting decisions to make on which kind of cards to buy, I was a bit lost at first but then understood better :) Nice visuals too!

The concept is very neat! 
I think some cards apperead outside the screen, but nothing too important
If the arrows were tabs instead, i think the menu management would be faster and less clunky, but still, it's a great job!