Third update, we keep going :-).
2 new maps implemented in the fourth area.
The Ultimate Tower has its own projectile and sound to match.
Submarines can no longer fire their jamming orbs when stunned.
Improved graphic quality for structures that change color over time.
Bug fix:
Small problem with the display of the game logo.
Fixed line of sight for many towers.
Added an index to the map to make the order of the story more obvious.
Fixed a visual issue under the core of some paths.
Fixed the ricochet tower projectile sometimes not disappearing.
Fixed a problem with tower upgrade, when building the same one twice, the first could disappear.
Fixed an issue on upgrade the Electric Tower while firing, arcs would no longer disappear.