I need a good start

[Koopapooper]

Ok, heres my main game story
Theres a guy named Sam D. Freman he works for a science group called
D.T.H (Discovery of Time Holes) they basically find and try to copy and make time holes so we can eventually manually time travel, well Sam went to work and figured out a way to commend a time hole,  when his partner
(The bad guy) who wanted to take all the credit(that mofo).His partner had planed to commit World Domination so Sam had to do something by using his idea of commending time. He eventually got to find the time his partner had gone back to do it, he has to fight his way in different times chasing him.
The ending is not to be told and the chasing isn't as boring as it sounds. but is the begining good or not, because I don't want a small-short start to it. Ive been working on this  for a year but haven't got to test play it because it had a error everytime I tryed it, I fixed it tho.well anyway what do you think?

[Linkforce]

Hmm.....well, it sounds good as a basic idea.  But there is no motive.  Why has his friend turned evil?  Why does he suddenly want to achieve World Domination?  Why does the Hero feel it's his duty to pursue his now evil friend?  These are all ideas you need to take into consideration.  Remember, the less plot holes, the better your story will be.

[Koopapooper]

Well, if someone was to find a way to make you king of the world someone would go bad.Here's how I have it going them two are friends they discovered the time hole wasn't a myth or legend and for years they built a lab to research the hole thing, while the partner (I'm finding him a good name for him) really didn't make friends with him for real, just so he could go back in time and explain it to his younger self so he do it from the begining and so he wouldn't be a 70 year old taking over the world.

The guy was evil to start with, he just used Sam.

He wanted the world so he could do something to impress his father cause his father didn't except him.

Sam didn't want him to take over the world or millions of people would die.