This example is a Dart port of an open source Win32 Tetris game by Chang-Hung Liang.

The original C version can be found here: https://github.com/eliangcs/tetris-win32

Original is licensed under the following terms:

Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means.

Used with thanks.