How to show to the player where he/she can maneuver

Unity Engine
1

I’m currently having a problem with my level design in the 2D game I’m developing . The problem is that I use a 2D background image as a background for my level on top of which I have created colliders (see attached screenshot). But the problem is that I can’t really show the player where to move as the edges of the colliders are not visible in the game itself.

So what I want to do now is to show the player the area in which he/she can maneuver. I wanted to do this with lights but the colliders I use for the level design are not colliding with the lights.

So in this case what would be the best way to show the player where he/she can move?
Or is this a flawed way of level design in the first place?

2908648--214417--Colliders.jpg

2

I feel this is a flawed way of level design. You could use this approach for a secret area containing a coin or something else of value.

3

Ok thank you. I think this is indeed not going to work out. I think I’m going to use rock sprites to get the level design I want. I need to look for some good textures.