The game itself is fun and addictive but be careful for your phone screen - I only played it for a few days, about an hour a day, and I noticed the block pattern the game uses as it's background image started to imprint on my screen. I saw it in the edges of my screen when I was out of the game. This is called a screen burn-in or ghost image and it almost ruined my phone screen hardware. I'm glad I noticed it.