Speed Minesweeper

快速清除所有地雷！

How fast can you clear all the mines?

Instructions:

- Tap to open a tile.

- Double tap to flag or unflag a tile.

- Tap on a numbered tile to open the surrounding unflagged tiles when the number matches the number of surrounding flags.

- Tap on the "+" button at the top right corner to start a new game.

This is the initial version. More improvements coming soon! Feedbacks are welcome!