I have to admit I completely didn't understand what I was supposed to do at first, but once I got it I played all the way through and enjoyed it. Maybe it was just the upgrades I happened to get but I definitely never felt low on coins and was able to pretty rapidly go through my deck and play everything repeatedly.
Having to keep an eye on the monsters and keep them alive kept things interesting. Sadly a long legged red dude tragically passed away right as I fed him a burger. If only I had been faster. Good night, sweet prince :'(