I am new to SpriteKit, and I am trying to make a simple game. however, when trying to integrate gravity, the player foes not hit the floor, but instead falls behind (despite having the same zPosition). I would like to know what I need to have the floor and player collide. I have currently set the collisionBitMask and categoryBitMask, have them on the same zPosition, and have gravity turned off of the floor, but enabled on the player. is there anything else that needs to be done?

I have started to make a Swift package to better organize my project, but I have noticed that when I try to use code from my package, some code will run much slower than when I use the same code in the project. How could this be solved? I have tried using @inlinable for functions, and it works for most functions, but some functions still fail to meet the performance standards that I see when I use the code in my project.