The game is challenging but simple to understand
However, this game could have been alot better, you stuck closely to the original but what you should have done was revamp it with new moves and enemies.
New moves could be:
Rape mode - you rape everything in your path but it only lasts a little while
Falcon Punch - you punch your enemies in the face and send them flying at other enemies. (kind of like pool)
Ground pound - when you toggle ground or air it will eventually be upgraded to an area attack on ground enemies so using your claw or beak is unecessary.
New enemies:
Turtle Soup - a giant bowl of turtles, you have to grab them when they float to the top but beware, they will jump up and snap onto you giving you damage every second
Bizarro Plimlpton - he's and evil version of George Plimpton that wil chase after the falcon and rip it in half if he is under you. (he is unbeatable, just an obstacle)
T-rex - basically its just a T-rex and you have to hit it multiple times in the back of the head, hitting it from the front will get you eaten.
And possible an extra defense mode where you have to protect Plimpton from zombie bunnies.
Please consider these ideas if you are to make a sequel, and i enjoyed listening to the soundtrack while writing this.