The Problem of Player passes through walls

This is the problem.

The player can easily get through the walls (0:17). I tried to edit the code but it didn't work.
How to make the player doesn't pass through walls?

The project is here. Help me download and test if you don't mind.
https://drive.google.com/open?id=1TnnI389gfGva1tyQomToYL1yhfQt4HNq

 

You are moving so fast that the wall is not detected. So you need to make the static wall thicker. If this is not possible, you have several more options but keep in mind that includes a performance cost. You can increase the physics update time step. Another option is to change the collision type to Continues Dynamic and the Interpolation to Extrapolate. Look into the Rigidbody Documentation.
Go to your avatar game object, search for the rigid body component and in the inspector look for the variables "interpolation" and Collision Detection.
For the timestep go to Edite> Player setting> Time> Fixed TimeStep and make it smaller.

 

you can either create a cube and place it half inside and outside the wall, and make sure to uncheck the Mesh Renderer option. Add colliders to the cube.
Also, I saw in the video that when the player collides with the wall, it produces a jittery movement, try shifting the player movement code to FixedUpdate (just giving an advice.)