tetris1k

## Description

_tetris1k_ is a basic Tetris clone that is designed to work on an unexpanded
ZX81 with only 1KB of memory. It plays as can be expected from a game of
Tetris with the player being able to move blocks left and right, rotate and
insta-drop them to the bottom. A later update of the game has a counter
showing how many lines have been cleared although this was not available in
the original version.

tetris1k