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.
Added message boxes. Added more levels to time trial. Added more precise
times. Added shooting particles at mouse. Added energy. Added health and
energy bars. Fixed particle physics and added more of them. Added
particles doing damage. Added enemy AI. Enemies now die permanently.
Fixed non-letter controls showing wrongly. Added support for items, but
not implemented yet. Other minor additions and bug fixes.