Love the game and its concept! In regards to Card Art... sucks you had to remove it and Kudos to everyone submitting art for it! ---AlexDude--- (rant) ITS BLOODY CTHULU!!! If you've ever read Lovecraft then you would know that you NEVER have an advantage, and moreover... its inevitable to be screwed into oblivion while being barking mad at the same time. (/rant)
One decently large bug... no method available to stop the purchase of a mage after you use shift to buy multiples. Lost a couple maps due to not being able to do anything else as I filled up all available slots with mages, but still had a mage "in hand" to place. Couldn't get it away, and couldn't click on anything else because of it. Otherwise, good game.
Order of operations is to be used unless otherwise specifically stated in the problem. The first thing s/he put there was "In The Order Shown" which would indicate that each line is a completely seperate equation using the previous answer... simple to those whose native tongue is english, but I also realize not everyone's is. =)