The pickaxe needing 20 gold is frustrating, especially considering how slow the generators are in normal speed. Making it cheaper, or just changing it from needing gold to iron would work well, considering the fact that people can get terracotta early on, compared to a pickaxe which people tsnd tk get later on
The turrets should be reworked. It'll work a lit better if there can only be a maximum of x ammount active, as well as having restrictions on where it can be placed, since people can just spam turrets over and around their base and make it incredibly difficult to actually have pvp fights.
Speed of the generators in normal mode is way too slow. It slows down and drags out play time. Since it takes 30 iron and 20 gold for a full set of tools, and another 20 gold for chainmail armour, and then 10 iron or 10 gold for a sword, it gets incredibly repetetive as you'll spend most of the time at your base getting resources.