Let  your imagination speak and find a idea that feels like it is the one 

First, make the game with card board to see if it is physically possible to play with it (possible to do the movements at the same time for example).

To make the pulling movements: take some hard wooden board so that the button in the middle does not move. Put a string to press the button, tape it to keep it still.

For the first pulling movement, the player has to pull forward and downward for the other one.

To make the shooting movement: take two card boards with one with a whole in the center to put a button. Glue some foam between the two boards so that the button is not pressed all the time.

To make the cymbals: same system with the two boards and foam between them. Add another board that will be in the other hand of the player.

To connect everything together and to respect the distances we need some elongate the original wires. We use then some wires contained in some usb to usb-b male cables soldier it with the ones capable of being connected with Arduino’s board and the arcade buttons. It does mean you have to split in two the wires on one side. 

Then connect to Arduino and JoyToKey at the same time, if it is not working make sure it is connected to an analogic current.

To make the game a little more complex, you can add things like sounds or lights. 

Personally we choose to have a sound whenever the clap is clapping. To make that you need to connect your arcade button to your arduino board  at the same time when is connected to JoyToKey. Then to play a specific sound you can use a MP3 reader if you want or create the melody directly on arduino.

Connect everything together, make sure it works and have fun!