Beware of the bingo board. The game has cost me upwards of 50 keys because it doesn't ask you if you are sure you want to spend them first. I was tracing the board to check if I was playing correctly and I was obviously too close to the screen so the game thought I wanted to spend keys. Just thought that I would warm people about this. Zynga please in the future have the game make sure that you actually want to spend the keys. I could have bought a whole new oven or windmill for that money thank you.