I didn't notice that yet. I played it a little. Kind of a dumb game but I like to support developers who make or port games for Android and more importantly, don't charge an arm and a leg for what is essentially a minor diversion. $1 is what I pay to hear a song on the jukebox at a bar. $4.99 is what I pay for a couple of beers
I don't mind paying a buck for a silly game but I never feel like shelling out $5 for them. These guys will make up in volume what they lose in markup.