Quantity   Component name
1 × GXM19264-01 GLCD with 192x64 pixels. You could use a 128x64 just as well, with minor code changes and no change to gameplay. I got mine for less than $4 each through taobao.
1 × atmega8a Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
6 × tact buttons
1 × blank pcb to attach the tact buttons
1 × schottky diode
1 × 4.7k resistor pullup for reset pin
2 × 100nF ceramic capacitors filters for microcontroller
1 × 8.3k resistor + 1k resistor Voltage divider in place of contrast pot (just use a 10k pot as LCD datasheet will suggest)
1 × solderless breadboard
1 × 1x20 pin header plus some 1x5 segments. All broken from a breakable 1x40 pin header.