snake_game

Classic Snake game written natively in XCX 3.0. Playable in the terminal with real-time keyboard input, progressive speed scaling, and persistent high score within a session.

Features

Requirements

Installation

xcx pax clone "snake_game"

Running

xcx pax run

Or directly:

xcx src/main.xcx

Controls

Direction reversal (e.g. going left while moving right) is ignored — the snake continues in the current direction.

Scoring

Speed increases by 20 ms every 50 points, down to a minimum of 60 ms per tick.

Project Structure

snake_game/
├── project.pax       # PAX project configuration
└── src/
    └── main.xcx      # Full game — single file, no dependencies

How It Works

The board is a flat array:i of size BOARDW × BOARDH (20 × 15). Each cell holds one of four constants: EMPTY, SNAKE, FOOD, or WALL. The snake's body is tracked as two parallel array:i lists (snakex, snakey).

Each tick:

1. A read_input fiber is spawned and waits for a keypress

2. @wait speed_ms delays the frame

3. The fiber result is consumed via .next()

4. step() moves the snake, checks collisions, and handles food

Food is placed by collecting all EMPTY cell indices into a set:N, then using random.choice from to pick one at random.

License

MIT