Import game statemachine

[novayo]

• [ ] Init
  • [ ] Enter: Load resources: sound / handlers
• [ ] Starting
  • [ ] Show start game page.
  • [ ] Detect
• [ ] Loading
  • [ ] Enter: Load Level
• [ ] Game start
  • [ ] Enter: level.play_background_music()
  • [ ] while in_game:
    • [ ] Detect key_input
    • [ ] collision()
    • [ ] Update player / background data
    • [ ] render_level_background
  • [ ] Exit: level.stop_background_music()
• [ ] Game over
  • [ ] Enter: play_gameover_background_music()
  • [ ] stop_gameover_background_music()
  • [ ] if life > 0: Go back to loading stage else Go to ending
• [ ] Ending
  • [ ] play_ending_music()
  • [ ] Go to init stage