Need help with level managers in simple platform game

I am trying to make a simple platform game with a couple levels. I have a control class that manages the player's input and stage boundaries, which is assigned to the player object, and a collision class I can call to detect collisions between objects. Everything works fine until I try to make the separate levels. I created a LevelOne symbol and put the player object and game objects inside, then assigned a LevelOne_Manager class to it. Suddenly nothing works. The player object doesn't detect the stage boundaries or collisions between platforms. What did I do wrong?

Hopefully! Nobody could give you suggestion without getting their hands dirty on your code.

arkitx