Version 0.7.2

Added end level part for level 3. Larger blue particle now bounces off
walls. Added new orange punching power. Added regulation for score
bubble and enemy spawning in levels, they are now about the same of each
in every game overall. Added many possible enemy and point spawns in
levels. Added new level parts. Added red score bubble. Made locked
powers faded. Made free mode start with everything unlocked.