I wanted to report two bugs, but I'm not sure will you be up to fix them man When you set collusion only for a single entity on the level, it will push itself away from itself (this sound weird, but I don't know how to describe it better ). And if you kill pushable NPC, you'll get crashes, same happens when player dies (probably the pointer still exist).
When you set collusion only for a single entity on the level, it will push itself away from itself (this sound weird, but I don't know how to describe it better 
). And if you kill pushable NPC, you'll get crashes, same happens when player dies (probably the pointer still exist). 