Self Study 4 (Simple Game)

For this self study, we were tasked to game a simple game where the players has a health count, if the player collides with an enemy then the player loses points and if the points is down to 0, the game ends.  

Here is the result:

NOTE: The health pill (Red blocks) doesn't work, i'm not too sure why this is, i have created a script and have added a onCollisionEnter to it, i have a box collider to it. I have all the component to detects the collision on the AI enemy and put it in the pill object but the collision isn't detected.

I'm not sure why that is but other things work.