Adaptive zones: more enemies, more damage

Ok so two big one in today's update !

Gameplay wise, when reaching a certain level, the lanes will morph to rectangular zones, that will constantly adapt to the number of enemies. This means that the riskier zone will allow you to do more damage. Playing around with it I feel it's really fun and makes for a more interesting end game.

Visually, when an enemy gets hit, the color of the hit will propagate throughout the enemy as before, but will stay and decay over time. That makes it both more impactful and more interesting to watch. It also makes it a lot easier to grasp the poison effect !

I hope you like it, as usual, I am open to feedback and thanks for playing :)