UI Font changed
Start Screen Added
Level Text Added
Background scroller added
Changed resolution to 600x900
Added some UI elements

TO-DO:
1. Fix UI bug
2. Make "start" menu to work
3. Add no-of-lives-left management
4. Add enemy waves
5. Change main assets (ships & enemies)
6. Add level management system
Added a simple UI Color Animation
To-do:
1. Make UI button to work
2. Add parallax scrolling
Fixed bolts colliding each other
Fixed Main Menu
Added Hi-Score
Added Levels