- Disney erected a 40-foot tall interactive game for kids of all ages to play. The way it works is like so: Dr. Doofenshmirtz flies around the screen on various evil vehicles while creating havoc for Phineas and Ferb. Fans are asked to man one of four full sized waffle-inator canons that shoot full sized foam waffles at the screen. Each time Dr. Doofenshmirtz is hit, Phineas and Ferb move up a level on the giant screen. The goal is to ultimately defeat the evil doctor and rescue Agent P before time expires. Sound simple? Trust me, it wasnt!