Player in main menu is in Platformer Mode now!
That mod modify MenuGameLayer that being used in MenuLayer.
MenuLayer is a 2nd layer that you see when game was just launched.
In MenuGameLayer::update method, that calls on every frame, mod freezes background and ground. That can be disabled in settings.
In MenuGameLayer::tryJump method, that calls every ~100ms, mod set player object variable that stands for platformer mode. And also randomly changes variables about holding left/right.
Mod have also updating schedule that make player object run away from mouse. It can be disabled in settings.