如何设置它以便只有我的播放器和物体具有物理体？

Creating a game like Doodle Jump, except for bouncing off platforms, my hero bounces off objects to collect points and progress in the game. As my hero "bounces off" the object, I set it to removeFromParent and it is working like it should. However, if my hero misses the object and accidentally hits the wall or ground, the object disappears as well which is odd because my ground doesn't have a physics body.Creating a game like Doodle Jump, except for bo