David Van Horn
This is a simple implementation of Tetris, developed using the design
recipe of HtDP. It uses Scheme Unit for test cases.
To play the game, require the library and invoke the _play_ procedure
with no arguments.
(require (planet "tetris.ss" ("dvanhorn" "tetris.plt" 1 0)))
A - clockwise rotation
S - counterclockwise rotation
Left - move left
Right - move right
Down - jump down
The game is currently written to include a "ghost peice" that shows
where the current tetra would land.