Many Behaviours Break When You Change The Z-axis

I'm making a 2.5-D game and added a way to let the player move on the Z-axis but whenever I try to add a feature such as solid objects on a different axis instead of the player only not being able to pass the object on the Z-axis the object is on the collision is on every Z-axis and is getting annoying since the player will just be able to go through any object.

Construct remains primarily a 2D engine and so things like collisions continue to work in 2D. You can add logic to "fake" 3D collision detection such as in the First-person platformer example, but Construct is not a full 3D engine, it's a 2D engine with a few 3D features that you can use creatively.