Fluidity

So basically you don't have an idea at all.
You saw a game you liked and want to do something similar. You have no idea, and you've come here hoping we'd give you an idea.

I do have an idea. My Idea is to use the basic game play of doodle god and make it into an entirely different game. In doodle god you drag pictures onto other pictures and that is it. This game will be a 3d first person sandbox free world environment type game. So for example, you find some iron in a cave (which you created) , you combine it with your cart that you made previously. And Bam. You have created a car which you can actually drive to run down those zombies you accidentally created.

This game will eventually seem so unlike doodle god that you will not even see the resemblance. (maybe)

FYI: If you made a FPS wouldn't that be copying call of duty? So before you say im just copying someone's idea. Im not. Im copying the style of gameplay and that is all.
So Yes, I have an idea, and all im coming here for is help making it because im not good at 3d game maker. Im not asking anyone for an idea.

Firstly. Sorry for not elaborating. I was in a hurry when i posted that and then forgot about it. And for those people who are saying its not my idea. I know. I am basing it off the doodle god games. My Idea is to make it into a first person game.

Now I will elaborate.

I have planned out most of the details but I need help in two specific areas.

1. I have used game maker for a long time and I can do pretty much anything with it, except for 3d games. I have tried the 3d part and a lot of it confuses me. If someone who is good at 3d game maker could please help me make the game or at least give me helpful tips It would be much appreciated. (If it's possible to import 3d models rather than using sprites that always face you, could you please tell me how.)

2. If you are familliar with the doodle god games you are aware that you have unlimited of each object. I am not sure quite how to do this with this game. If I don't do it the player will need to go and find each object which could work, but I don't know. I was thinking maybean inventory system with unlimited of every object that you have made, but would that make the game less fun?

If you have anything else you would like to contribute such as ideas or helpful tips i will be happy. XD