My latest asset for the GameMaker Marketplace is a Tetris demo. Fully-featured, and configurable, it requires only sound files to be added to complete the project.
![](https://i0.wp.com/csanyk.com/rants/wp-content/uploads/2018/09/tetris_screenshot.png?resize=682%2C384&ssl=1)
It’s meticulously researched, beautifully coded, fully documented, and rigorously tested, and represents approximately 150 developer hours of work, for only $4.99. It’s playable as is, right out of the box. It’s easy to understand the code, easy to configure with simple changes to the code, and modding is encouraged.