Nice entry, I liked watching the attacks unfold.
There are some things I'd like to mention, though. For example, I would prefer if I could see the stats when choosing which cards to give. Also, I didn't understand why sometimes I had to select all 5 cards and sometimes only like 2 or 3. More polish and animations and such would be nice, but I understand that 48 hours is not a lot of time.
These things aside, nicely done!