Updated Bubble2D's update() method. How meta.
Renamed Bubble2D's position member to pos.
Added some comments for the Bubble2D class's methods.
Get rid of the 500 magic number, replace with MAP_WIDTH + 20
Converted tabs to spaces.
Added comment for scale_and_round().
Replaced the magic numbers for the map and window dimensions with con…
Aligned the color constants and got rid of the powerup_types variable.
The intial files for square-shooter.