Ninja vs. Robots

My previous game has been made in a few weeks and hasn't been satisfactory for me.
I decided to create another game, more complex and complete. The ninja's village is invaded by enemy robots and the ninja shall destroy 'em all.
This ninja, from a programming point of view, has many abilities:

• he uses various body parts independently;
• he uses various weapons with both hands;
• he uses a boomerang which can launch, get back, and pick up.