Happy Wheels/WMG

The Irresponsible Dad and the moped driver are the same person.

 * The Moped guy could be the Dad at a younger age, possibly before he had a son. Or the same age and he's just spending time with different people.

Future character ideas

 * A clown on a unicycle
 * Or a bear on a unicycle with a killer swipe attack!
 * Baby carriage.
 * Even better would be Baby Timmy pushed around by the Irresponsible Dad's wife!
 * A kid on a tricycle.
 * Flying carpet
 * Rider on horseback
 * Railroad lever-powered cart.
 * A Quintessential British Gentleman on a Pennyfarthing.
 * A guy on roller skates.
 * An extreme skateboarder.
 * Or a dog on a skateboard.
 * A man on skis with a rocket/jetpack strapped to his back for boosts.

The Moped Couple are Amelie and Nino from the end of the movie.

 * Pretty damn good resemblance, huh?

The characters are unable to really "Die"

 * they remain fully conscious after death, but are not able to move. the pain they felt as they died never leaves them, and is intense, say for example: X was completely eaten up by Y's lawnmower, X would feel that excruciating pain forever, without anything but the pain, no senses, no mind. Characters have been known to cry in pain when their waist and up is being chopped by a lawnmower, and move if their top and lower body are solely connected by an intestine. If they were decapitated, they would feel the blade severing their neck forever, being able to see everything and hear everything going on around them, and remaining fully conscious with the pain that killed them.

Every character is actually designed in a laboratory to make the perfect mobile soldier

 * In the far future, humans are losing a battle against alien invaders. As such humans have decided to genetically engineer humans that have a fighting chance against any threat while also travelling in creative ways.
 * Wheelchair Guy can travel extremely quickly to the enemies but dies easily if he splats against a wall
 * Segway Guy is a typical foot soldier against the enemies, is fairly sturdy and can jump over things.
 * Irresponsible Dad is an ambulance unit for small children but isn't...very good at it
 * Efficient Shopper is designed to ram into large groups of enemies
 * Moped Couple is an ambulance unit used for more dire straits, it can travel a lot faster than the Irresponsible Dad model and so works a lot better at escorting patients.
 * Lawnmower Man is for when the only way to absolutely keep things dead is to shred it up into a billion pieces.
 * Explorer Guy is used to fight the Invaders on metal surfaces, but slips up easily on any other surface
 * Santa Claus is an odd example. The original Santa Claus was one of the Invaders who was captured and cloned, made obedient as well as two of his little Elven slaves.
 * Pogostick Man is a genetically perfect Ninja who can withstand a lot of damage and also perform amazing parkour with his pogo stick which is made of some amazingly strong metal- the same as most of the other vehicles.
 * The Invaders may be the same one as in Space Invaders, the hazards are equivalent to ones the Aliens use and all the User created levels are virtual simulations used to train the Clones and designed by a group of hyper-intelligent but somehow slightly retarded scientists.

A future character will be voiced by Pew Die Pie

 * Both Uber Haxor Nova and Pew Die are known for their Happy Wheels Let's Play videos, and Nova got to voice Pogo Stick Man.