Get supplies, listed above.
Take your button or real pushbutton, and set up a circuit. Do not use a male end to connect to an arduino. Fit the open wires into the slots. Digital pin 9.
Take the analog stick and solder the appropriate wires to it. Place ground to ground, 5v to 5v, x to A4, and y to A5. Again do not use male ends to the arduino.
Take the tft shield and place it over the arduino securing the wires.
Take the micro SD card and upload a game. Rename the file to "game.gd".
Take the SeeedStudio TFT libraries and install them.
Upload "Gameduino.ino" to your arduino.
Insert SD card, reset, and play.