The roll pin will come out either way but first if you can just take a magnet and try to fish the buttons out. The pin is more than likely broken any way. All is is is a pin that holds the buttons in place for assembly. I haven't used a pin in them for years.
Alot of the time the buttons will fall out when you pull the axles.
Stand the axle on end if the pumpkin is in the houing and they may fall out too.
If the pumpkin is not in the housing they are a piece of cake to get out. Grab with a long needle nose pliers.