How in Unity, in 2d mode, to make sure that the character does not change its angle when it comes into contact with an obstacle in motion?

Question

Game development

View from above. It is necessary that the character go around the walls. Added Box Collider 2D to the wall, Box Collider 2D and RigidBody 2D to the character, zeroed gravity. When the character touches the edge of the wall, the movement continues to change its angle. I wish he would just stop in that case. How can this be achieved?

Answer 1

Constraints -> Freese Rotation