Increased game area;
Refactored some constant values into macros;
Updated PhysicsManager to use GameObjects;
Updated GameObjects to have collision groups and masks;
Implemented rudimentary collision callback in PhysicsManager;
Changed player appearance to a semi-transparent sphere (not working properly);
Added method to create 'Evil Balls' with random position/orientation/velocity;
Players now shoot projectiles (small balls), that live for a set amount of time and destroy themselves and balls when collided;