Add pausing, title screen, save files.

[EscapeToTheCity]

When developers use this engine, there should be a standard means of a title splash screen and a pause menu.

You have three options for save files:

• JSON.
  • Pros: Natively supported. Human readable. Relatively easy for newbies to grasp.
  • Cons: No comments, which will be needed for parts of the file.
• XML.
  • Pros: Structured and extensible. Supports comments. Pretty widely used.
  • Cons: Verbose. Harder to parse, especially once it gets big. Not as natively supported.
• SQL.
  • Pros: Powerful. Enforces data integrity. Scalable.
  • Cons: Complex. Could be too complicated for a small Sonic fan game. Could definitely require dependencies.