The realistic physics engine in happy wheels is a standout feature that makes the in-game characters and cars operate in ways that are in line with the laws of nature. This increases the difficulty of the game by requiring players to take extra care when navigating their characters through the levels so they don't get hurt.
Many playable personalities can be unlocked in Happy Wheels, each with their own set of skills and personality quirks. To complete the stages, players can select from a variety of vehicles, such as bicycles, Segways, and even a lawnmower.