Unity2D - Box Collider 2D problem

By default, rigidbodies simulate gravity. You can set the component's gravityScale to zero to disable this.

This is a frequently asked question that can be answered with a link to the manual, so I'm a bit reluctant to let it through the moderation queue.

Sorry, "rutter", but gravityScale to zero isn't helping me.. I don't know what i'm doing wrong. I'm new with Unity, that's all

I am not very confident about 2D, but try a work around,

Ins$$anonymous$$d of a plane add a cube with a cube collider. It will give off the same effect as a plane in 2D. And then check if that works out for you...