I've noticed that there are a lot of really mediocre Tetris clones on the Internet, most of which only make it halfway there. That is, most Tetris clones seem to forget things like the Hold Queue, the ghost, hard drop, and especially the more subtle things like the delay between the piece reaching the bottom and the piece actually locking into the Tetris matrix.
This program was an attempt to write one single Tetris clone that includes all of those things, as well as added features like...