Tetris

Tetris in the terminal, written in C.

A small, self-contained demo written in pure C — no external libraries, just the standard library and POSIX. Part of the Corg-Labs collection of single-file C programs.

---

How It Works

1. Seven tetromino shapes are stored as 4x4 rotation bitmasks
2. Collision is checked against walls, floor and settled blocks
3. A gravity tick drops the active piece on a timer
4. Full rows are cleared and scored

---

Build

gcc blocks.c -o blocks

Run

./blocks

Controls

a/d move, w rotate, s soft-drop, space hard-drop, q quit.