Add a start screen for game

[PrajwalKrishna]

The game does not have a starting screen as of now. I wish that the game has a start screen where controls would be shown rest depends on creativity of person implementing.

[RodolfoFerro]

Hi @PK1210 is there a CONTRIBUTING.md file for this repo?

[zeroxenator]

Hey, Can I take this?

[PrajwalKrishna]

Yes sure you can take this alas no I don't have a CONTRIBUTING.md for this repo. But I believe that you can go ahead with the Start screen/