the gradles
inittial bss
The bullets, the movement, the sprites
Spawn bombs at the top and add collision and collision damage
functionality
bs
GUI and crosshairs
Explosion logic.  Rename events to make mroe sense
Explosion, level loading
make drawablepart store sprite to store state.  created cannon for the
shooter guy
Spawn the bullet in the cannon mouth.  Game tweaks
Lil bit of refactoring.  Add game pause and game speed multiplier
New enemy sprites.  Make enemy spawn out of bounds so its not like they
appear magically
pretties: trail and new bullet sprite
Z-order implementation draw sprites in order of depth
new fonts and playe sprite
Refactoring code into screens.  create basic main menu
Created ufo enemy
create star backdrop.  make ufo glow before creation
Cleanup backdrop manager.  A couple other refactorings.  Make sure the
player and the cannon are actually dead when they die
ghosting