Big enemies implemented and added to levels 2 and 3.
Enemies now fire per enemy at different rates based on enemy type.
02_18_2014 - Fixed level indexing bug when reaching max level.
02_18_2014 - Added ability to start at different levels.
02_18_2014 - Added new tri enemy type.
02_18_2014 - Fixed overkilling enemies bug. Fixed extra enemies during boss fight bug. Fixed potential enemy deletion errors.
02_18_2014 - Bullets can now be initialized with a horizontal velocity.
02_18_2014 - Made bullet erases occur upon deletion and only when necessary.
02_18_2014 - Tri enemies now shoot a spray of three bullets.
02_18_2014 - Made level announcements flash colors.
02_18_2014 - Forgot to commit new .gba file in last commit.
02_18_2014 - Added levels five and six.
02_18_2014 - Updated .gba file.
02_18_2014 - Commented main, myLib, and levels files.
02_18_2014 - Preliminary Shop implemented.
02_18_2014 - Implemented bonus money from hit rate percent.
02_18_2014 - Added ability to give ship bullets a horizontal velocity.
02_18_2014 - Refactored weapon costs into their own functions.
02_18_2014 - Ship now shoots 1-3 bullets based on weapon upgrade level.
02_19_2014 - Updated README with file structure explanation.