Great game, terrible ads

Game play is fantastic, but I keep getting an ad for Big Fish Casino that doesnt have a way to close the ad. I have to shut down the whole app every 2-3 moves and restart the game because the ad is back. Then I get a popup telling me that the ad free version is $1.99. It feels like a shake down.

Used for knitting about Blokus™ Free - Attack, Block & Defend!