Don't Touch My Crystal (Tower Defense)

Submission for Weekly Game Jam: Week 107 - Theme: Don't Touch It 

Build towers to stop the enemies and gain points.

Towers:

Water Tower (40 Water Energy) - Slows enemies.  Will occasionally blight a wetlands area.  If no wetlands are in range, it will not fire.

Fire Tower (40 Fire Energy) - Rapid Fire with slight spread.  Will occasionally blight a desert area.  If no deserts are in range, it will not fire.

Earth Tower (40 Earth Energy) - Slow moving, high damage projectile.  Will occasionally blight a rocky area.  If no rocky lands are in range, it will not fire.

Air Tower (40 Air Energy) - Shoots a chain lightning.  Will occasionally blight a grasslands area.  If no grasslands are in range, it will not fire.

Arrow Tower (20 of Any Energy) - Shoots arrows.  Has no effect on the land and is not effected by the land.

Spirit Shrine (5 Air, 5 Earth, 5 Fire, 5 Water Energy) - Generates extra energy based on the type of land within it's range.  Can also cure blighted land, making it into a land type based on it's surroundings.