Making a shooting character with the Platformer Starter kit

In the product page for the Platformer starter kit, it mentions that this starter kit is perfect for people who want to make Super Mario and Mega Man style games. The game that I am making incorporates game play elements from both.

At this stage I have a chacter that can do all the same things that the dragon can do in the platformer demo.
Run, Jump, fall etc.

Now I want to add the ability for the character to shoot a weapon. Like a pistol or machine gun at his enemies. Does anyone know where I can find information to do this?