v0.20

Efficiencies

moved occlusion monitoring to player

removed unnecessary collision shape on enemies

Added new resource and structure art

Added Attack Level stat

Added tooltips for resource icons

Resource tooltips tell you the number of the resource that has been discovered

Upgrade icons tuen green when you have enough research points to upgrade

Added new background tile art

Can upgrade towers to level 3

Can upgrade attacks to level 2

Can't upgrade golems yet