3 Problems

Okay im trying to make this The Binding of isaac 3d thing but a really crappy piece of S*it.
I have 3 problems:
AI enemies coming toward the player and attacking a health value(i dont have the value xD)
Shooting. (Like i can shoot some balls out of the player. Unlimited ammo not just the one unlimited. Its first person so yeah)
Modifying the shootin when touching certain things.
I just nedd even any way to do these. Any script that does the job.
I dont have any scripts to start with…

Well none of them problems can be rectified unless you provide source code and a clearer explanation/demonstration of what is occuring?

Honestly, a problem needs a proper description, preferably a list of things you’ve already tried to solve the problem and of course a brief explanation of what you’re trying to achieve (not just ‘shooting’).