Awesome game! Really liked the concept and the pixel art!
Reporting some issues:
After playing various times, I noticed a message on the corner saying "Grid.hx:102: testCol Fail!". Don't know when it happened, but I hope it can be of any use. Also, the image of the Bull in the card shows as some kind of red paper imp, not the Bull I suppose it should show.
http://i.imgur.com/dg0J9gt.png (Here's a screenshot don't know how to embed a picture, sorry :P)