First, I don't know if this would belong to dedicated systems or somewhere else but whatever moderator thinks is better.
A Simon clone, about 3 hours to solder and wire it up. No case yet and missing the sound though I didn't have a buzzer to steal but it works without the sound. LCD display the menu option for 1 or 2 players, speed, and limit to number of turns. I also need to do something about power source, a 5v 4A bench supply is not light and portable I'll probably get a 4 AA battery case and wire in a diode to drop from 6v to 5.3v for safe operation.
I got the instruction and code from http://www.instructa...ys-on-steroids/ I might try an empty Gameboy case for the board and LCD but I doubt the LCD fits and it's hard to find a smaller 16x2 display.
If anyone wants to do this but don't use Arduino IDE or have trouble compiling, here's a hex file for direct burning via AVR: https://www.dropbox....ll.cpp.hex?dl=0