Good game and fun mechanics but i just cannot recommend it to someone due to the ai art in it. However i understand your disclaimer and want to know, how much would it cost to replace the ai with real art? i will be more than happy to donate money to the creators if it means i can fund the support of real art being used in games.
also, could there be an endless mode? You could build off the idea of that one screen that pops up when you win early as people run away saying "its pumpzilla" (i forget the actual name used).