> The only weird thing about this is that you are using a Tiled Background as an enemy. The Tiled Background is for a background, it doesn't have a collision box that you can edit.
That's nonsense, it depends on the obstacle type, if full square collision is valid for the obstacle, then there's nothing wrong with checking collision with it.
I use it to make stretching walls or lasers, lava and more...
It's possible to use it for that but you cannot edit the collision box and it's a bit weird because it's supposed so be something in the background. My issue was that he was using it for an enemy, for this it's better to use a sprite with behaviours.