According to the pilot, he departed in a single-seat homebuilt airplane; however, the airplane did not feel "stable", so he elected to abort the takeoff. During touchdown, the airplane's nose landing gear hit the runway first. After the nose landing gear struck the runway, the rudder was jammed, and the airplane departed the runway surface. The airplane struck a runway light before coming to a stop. Examination of the airplane found that firewall damage had impacted and jammed the nosewheel steering and rudder controls. Damage to the airplane's left-wing leading edge, and substantial damage to the left horizontal stabilizer, and elevator were also noted.