Game Flow Control

[dreammelter]

We need a game manager that will:

• [x] transition between game states and their related scenes
• [x] persist game data between scenes (coins, booster foods, etc.)
• [ ] save and load that game data (#2)

[dreammelter]

Configuring a script as an autoload in the project settings should do the trick, but I'll double check the docs for any other tips.

[dreammelter]

Booster Foods still technically don't exist, but the variable to track coins in an autoload does. Save system is also not in place, but maybe that's a feature for another... month.