error Assets/jorge.js(7,1):: BCE0044: expecting }, found ".

Welcome to Unity Answers! Thanks for including exact error message you encountered. That usually makes it a lot easier for us to help you.

Careful organization is a programmer's best friend.

If we organize your code a bit, the problem becomes more clear:

 function Update() {
     if(Input.GetMouseButtonDown(0)) {
         transform.up += 1; 
     }

You're missing a last } to end the Update() function.

As an aside, I'm fairly sure you mean something closer to this:

 function Update() {
     if(Input.GetMouseButtonDown(0)) {
         transform.position += Vector3.up;
     }
 }

You can't really add an int to a vector (each vector is represented by three numbers: x, y and z). In the revised code sample, I'm instead adding two vectors: current position + (0,1,0).