What is tetris?

This repository contains a working Tetris clone, the classic block-stacking puzzle game where you rotate and arrange falling shapes to clear lines. It's a playable remake of the familiar game, built from scratch in C++. The game uses a combination of SDL (a library that handles things like window creation, keyboard input, and drawing graphics) and OpenGL (a system for rendering 2D and 3D graphics). The description also mentions WebGL, which suggests the game can run in a web browser alongside the desktop version. At a high level, the program takes player input from the keyboard, updates the game state as blocks fall and lines clear, and draws the result on screen using OpenGL graphics. This project would appeal to someone learning game development who wants to study how a simple, complete game is structured. A beginner could read through the code to see how game loops, input handling, and rendering fit together in a real project. It's also a straightforward starting point for anyone who wants to modify a Tetris game, say, changing the rules, adding new features, or experimenting with graphics. The README doesn't go into much detail beyond confirming what the project is and who wrote it. There's no documentation about controls, build instructions, or how to run it, so a user would need some familiarity with compiling C++ projects to get it working. The code itself, written in 2013, is a fairly traditional approach to a small game: one language, standard graphics libraries, and a well-understood game to implement.