Balancing Creativity and Reality ?

hello everyone my name is jonathan jennings and i am a gamer/ game programmer/ aspiring game-designer....yes that is a lot of dashes .

As of now i am putting together my second gaming projct for my portfolio and my first cmpletely stand-alone project. as of now i plan to do everything concerning this particular game myself( except music design that's my weakspot)

I am both excited about this project and confused. I finally feel that on a technical level I can produce wit  my game-design tools what i envision in my mind. With that said i have managed to hit a wall. What happens when i can do virtually anything i desire but doing everythinjg i desire could potentially cause my game to be a poorly organized mess that essentially breaks down to a poor colelction of minigames and literary references ?

The fact my game-design idea is very flexible doesn't help much at all. Any tips would be appreciated but  even as  I type this my slightly more logical side is peaking out. the fact that this game is supposed to be a demonstration kind of says it all. i could focus on ,making my game mindblowingly awesome with a few  medioce implemented methods or i could focus on the crucial elements and make sure everything is fleshed out so while my game may be less astounding on a visual level it will be much better on a technical level...yeah...i guess that's the key.

but let's not go nuts now who says my game can't be nuts and well-implemented at the same time :)

thanks for reading !