Story Mode Added

I have added Story mode to the game. In addition to that, I have fixed structure spawning, and I have added additional stats and how stats are stored. 

Story mode has a few major differences compared to Arcade mode. For one their is a live system, and you only restart at level 1 when you run out of lives, instead you restart on the same level, although it is regenerated. Secondly, their are bright green spaces, these spaces, when ran over by the player, open a mini game screen where you debug a code snippet from the actual game.

Structures are now properly spawned around gold and green squares. it involves a simple square with openings on each of the sides and then the center being open. This has caused a problem where the maze is split into two parts, and you may not be able to access import items. You can overcome this by using the enemy to break walls down.

The additional stats added are a time in seconds (it is based on ticks so if the game runs slowly it wont hinder your time), successful debug sessions, and gold squares collected. The stats are now stored inside of a json file instead of a plain text file.