Four-way game body

There are two to four objects with different gravity directions in each checkpoint (there are only four situations of up, down, left and right). Players can only control one of them at each moment, thus the control object and the non-control object can be separated. The non-control object remains still and has a collision body no matter whether there is a collision body under the foot or not. Each of the four objects corresponds to a key. Press the corresponding key to switch the control object, the original object becomes a non-control object. There may be multiple end points, and each end point has a requirement for which object to enter. When each end point is successfully activated, it can be cleared. The core of the play is how to bridge between different objects to reach further places.