First things first, the card art is great! It really stands out and elevates the whole package.
The audio works well enough, though the music does get a bit repetitive. I appreciated that it stayed light and happy though, considering the premise of the game is that you're killing time waiting for something more exciting to happen.
The gameplay itself... is War. The first round took painfully long. I'm glad I stuck it out though, because I did like the following rounds! Adding the abilities was cool, and made it feel more engaging.
Nice work! Considering all the neat MG designs on the cards, I'd love to see you do a game that featured more of these girls!