The only fan made game I can think of that I remember playing as of recently is the demo of the metroid 2 remake. Its known as another metroid 2 remake and you can play the game start to end, but it hasn't been completed yet. The maker is working on finalizing the later areas of the game and the ending. If you liked the gameboy advance releases of metroid fusion and zero mission, it uses that engine and it's modified to the point where it has extra controls like diagonal aiming, an aiming cursor, and the option to select weapons either super metroid style (select button), or like the gba ones (hold down button.)