Arduino Tetris (MAX7219 8x32 LED Matrix + 4 Buttons + Buzzer)

No screen, just 256 LEDs: Tetris with music on an Arduino! A **MAX7219 8x32 LED matrix** standing upright becomes an 8 wide, 32 tall playfield, and 4 **buttons** move, rotate and drop the pieces. A **passive buzzer** plays the Tetris theme, full rows flash away and the game speeds up every 2 rows. The matrix is driven **without a library**, and the best score is kept in **EEPROM**.