Switched develop branch to developMode
Change which light direction is green first
Added cash to the levels
added main menu, with tutorial level and simulation level options
oops, hadn't added all the files for previous commit
Formatting/Go to level after beaten/Speed up cars/Adjust scores and money
Change to match John's TutGUI constant
refactored car collisions to use OnExitTrigger. Think this fixes collision
stop/start bug
Crash explosions
Staged for playtesting