hum yeah that game offer many different strategies but I doubt you can go past mars/saturn with your way
Mars has 3 new type of enemies.
- One type of creature spams little droids, when the dies, that are invisible to turrets so you have to use capacitors (manual targeting turrets) or droids factories to kill them.
- Ghost, barely visible, and only killable with capacitors
- High speed spiders that rush the first building they see.
Also it introduces a new type of spawn point that no longer spawn units at the border of the map but somewhere inside the map.
So yeah, I think it can be very tricky to spam turrets near spawn points past moon
Also, silos was the old name for "preprocessor". The devs kept rising the cost of silos research during the many releases because it's very powerful :D. Roughly, there are 3 types of minerals : small, medium, big that contains respectively 2000, 4000 and 6000$.
Let's say you put a refinery, near a big and a medium mineral. It'll give you 10000$. But if you spawn 4 silos around the refinery, it'll increase the cash you can extract from a mineral by 50% (12% for 1 silo, 25 for 2, 33 and 50 for 4 silos) so it'll give you 15000$ instead of 10000$. So yeah, silos can increase a looott the amount of money you can make in one level ^^