I would say this is a good place to start. I did a Game Gear emulator in a single night with a buddy, having never written one before, just for the lulz. You a

I would say this is a good place to start. I did a Game Gear emulator in a single night with a buddy, having never written one before, just for the lulz. You are bound to have an awesome game you can find on an 8-bit system and it's really fun trying to get to the point where you can play the game: getting the logo to appear, getting the title screen up, getting the sprites working, adding controls etc.