*the wiring of the LED's could be separate from the controllers power, depending on LED's, 2 x 1.5 to 1 x 9v battery would work, like i mentioned before, the space inside would help, joystick would be the most difficult part, but still not overly complicated.
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forgot the LED part
*the wiring of the LED's could be separate from the controllers power, depending on LED's, 2 x 1.5 to 1 x 9v battery would work, like i mentioned before, the space inside would help, joystick would be the most difficult part, but still not overly complicated.