The 4.0.0 update, which gained massive popularity throughout 2021, served as a major milestone for the engine. It optimized mobile touch controls, expanded the asset library, and stabilized the physics engine to closely mimic official physics. Key Features of SMMWE 4.0.0

The update integrated complex assets like custom power-ups (including the Propeller Mushroom and Penguin Suit), track systems, custom scroll speeds, and multiple sub-areas.