As Much as I like the minimalist approach, some tooltips would be nice, along with a goal/target for prestige instead of blindly upgrading in the hope of getting somewhere
When Upgrade cost = Current gold, it wont let you buy the upgrade...is it a bug not allowing you to have zero gold? Also can only build towers immediately next to path, would like to be able to use all of the range on towers.
 "Idle Drone Delivery"){kind=icon}
 "Battle without End"){kind=icon}
 "Da Vinci Cannon 2"){kind=icon}
 "Shop Empire 2"){kind=icon}
 "Simple TD Beta"){kind=icon}