HotlineMiami-like controls

Hi there!
This is the second day of my Unity adventure and I already have a problem.
I want my game to have aerial camera view and player should walk in 4 directions- on axle x and y.
At the moment, I managed to make it walk in these directions, but there is a problem: when it walks in the x directions (pressing A or D on keyboard), I can't make it move to the y direction at the same time. When I start to walk with W and S on y axle and want to go on the angle, pressing A and D at the same time, it works perfectly. Can you help me?

This is the source code in JavaScript:

Code (JavaScript):

1.  
2. var MoveRight : KeyCode;        //Zmienne ruchu
3. var MoveLeft : KeyCode;
4. var MoveUp : KeyCode;
5. var MoveDown : KeyCode;
6. var Shift : KeyCode;
7.  
8. var runR : Sprite;                //Sprite ruchu
9. var runL : Sprite;
10. var runU : Sprite;
11. var runD : Sprite;
12. var Nrun : Sprite;
13.  
14. var Speed : float = 1;
15. var end: Transform;
16. function OnTriggerEnter(end){
17. Application.LoadLevel(1);
18. }
19.  
20.  
21.  
22.     function Update () {
23.    
24.         if (Input.GetKey(MoveRight)){
25.             GetComponent.<Rigidbody2D>().velocity.x=Speed;
26.             GetComponent(SpriteRenderer).sprite = runR;
27.         }
28.        
29.          else if (Input.GetKey(MoveLeft)){
30.             GetComponent.<Rigidbody2D>().velocity.x = Speed*-1;
31.             GetComponent(SpriteRenderer).sprite = runL;
32.         }
33.        
34.          else if (Input.GetKey(MoveUp)){
35.             GetComponent.<Rigidbody2D>().velocity.y = Speed;
36.             GetComponent(SpriteRenderer).sprite = runU;
37.         }
38.        
39.         else if (Input.GetKey(MoveDown)){
40.             GetComponent.<Rigidbody2D>().velocity.y = Speed*-1;
41.             GetComponent(SpriteRenderer).sprite = runD;
42.         }
43.        
44.         else {
45.             GetComponent(SpriteRenderer).sprite = Nrun;     //stanie
46.             GetComponent.<Rigidbody2D>().velocity.x=0;
47.             GetComponent.<Rigidbody2D>().velocity.y=0;
48.             //Speed = 0;
49.         }
50.        
51.        
52.         if (Input.GetKey(Shift)){
53.         Speed = 10;
54.         }
55.         else{
56.         Speed = 5;
57.         }
58.        
59.                 }

 

Also, I'd like to make my character look at the direction which a mouse cursor is pointing at. Is it even possible?

 

Thank you very much. I combined solutions from both of your links and it is working perfectly fine!