实现一个俄罗斯方块的小游戏，跨平台源码。主要包括界面的设计，以及对俄罗斯方块变换、以及7种方块的标识。(The realization of a Tetris block of small games, cross platform source code. It mainly includes the design of the interface, as well as the transformation of the Tetris block, and the identification of 7 kinds of blocks.)