Ive put many, many hours into this app, and its a lot of fun. However, there are a couple of issues. The first is when youre forced into a situation where you have a 50/50 chance of hitting a mine and theres no way of guaranteeing a safe selection. Its very annoying when youre down to the two last tiles, but you dont know which is a mine and end up guessing wrong. The worst, however, are the ads the take you to the App Store when you click anywhere. Theyve gotten disgustingly common, and it interrupts me constantly while Im playing. Even though I like this minesweeper app, I just cant play anymore because of these ads.