Tetris Example in Rust, v2

A Tetris example written in Rust using Piston.

• For demoing basic Rust coding
• 414 lines of code
• A clear Git history that iterates on added features. See: git log --reverse -p 855e7fddd..HEAD
• The completed lines are flashing
• No scoring
• No 'next piece view'
• No automatic restart after 'game over'
• No change in falling piece speed

1. Install Rust from main site.
2. Perform the following:

git clone https://github.com/da-x/tetris-demo
cd tetris-demo
cargo run

Changes from v1

• Simplified the handling of the game state.
• Using a HashMap instead of a Vec<Vec<_>> for board and pieces.
• Less lines, same functionality.
• A clear Git history that iterates on added features.