See thats just part of it, nobody's done a MW with a Joust cocktail that i can find.
There's a reason for that. Look at the game list:
Defender - Up and down 2-way joystick, 5 buttons needed
Stargate - Up and down 2-way joystick, 6 buttons needed
Joust - Up and down 2-way joystick, 1 button needed
Robotron - Dual Joysticks
Bubbles - 8 Way Joystick
Splat - Dual Joysticks
Sinistar - 49 way joystick, 1 button needed
Blaster - 49 way joystick, 2 buttons needed
Of those games, only Joust is simultaneous 2 player.
Again, do what you want, but I'm glad you're planning on an original boardset.