Unity 5 object collision not detecting

So I’ve just started using Unity and new to C#.

I’m running into a problem where my sphere (player) wont detect collision as it touches other objects (runs right through).

I wanted to have the player move units by units corresponding to my left, right, up, down keyboard inputs instead of physics.

heres the code:

edit: sorry im not very familiar with the forum on how to type my code in the right format, therefore I just uploaded the file

2085313–136366–a.cs (614 Bytes)

Do the other objects have colliders and rigidbodys on them?

http://forum.unity3d.com/threads/using-code-tags-properly.143875/

–Eric