Happy Wheels is a physics-based side-scrolling action game developed by Fancy Force and designed by Jim Bonacci in 2010. The game features various characters riding on various vehicles and attempting to navigate through challenging levels filled with obstacles, such as spikes, saw blades, and bottomless pits.
Happy Wheels logo font on the box art is probably Clarendon, a slab serif created by Robert Besley for Fann Street Foundry.