Lift is a flight sandbox game. It is based on real world physics, but what you build is completely up to your imagination - from Superman to WWII bombers and everything in between. Compete against your friends in challenges, or play in sandbox mode where anything goes. Time manipulation and plane destruction features allow you to watch your beautiful creation crumble into dust frame by frame when you crash. Early alpha versions are free to play and will be released in Web, PC, and Linux form.
A collection of gifs and screenshots of user created planes.
The user who created this plane named it "Birdy". It was a very fun plane to fly. Unfortunately, version changes have rendered it unavailable at this time.
Does it flap it's wings (in scientific terms: is it an ornithopter?)