Seneca Crane was head gamemaker.
it is easy to make a game on 3d gamemaker
It was never mentioned who the first ever head gamemaker was, but for the 72nd, 73rd and 74th the head gamemaker was Seneca Crane. For the 75th games Plutarch Heavensbee is the head gamemaker.
Go the object you wish to decrease health from. Go to the score tab and select the gray health bar at the bottom. Set Health to "-" then the number you wish to decrease it by in the set health box. Click OK.
GameMaker isn't meant for making 3D games, but it is worth the money you pay to register. I hear there is a better 3D game-making program called Roket3D.
Health Points and Mana Points
It is a great program. I imagine that the recently-released gamemaker 8.0 is ever better. You can download it at yoyogames.com
Not GameMaker related
You don't!
First, If you haven't already, download GameMaker at YoYoGames. Then, follow the intructions when you start the program, that will take you step by step into buying the product.
gamemaker, you don't need to know code, and it's possibilities are near endless http://www.yoyogames.com/gamemaker/
You can add numbers. Usually it doesn't really make sense to add points.