Hi! I have about 100 hours in this game in steam and try to answer your questions now. Logic works as a block program language: you can create cycles, check conditions and send commands with your logic processors. It is a lot of guides and ready programs in the Internet it for this. You can plase some storages right next to your nucleus to expand it's storage. You can see belt throughput if you click the bottom with "?" sign in bilding menu if you chose belt as a bilding object. About defense: believe me, it is rather funnier to find your strategy in it yourself. To defeat extreme and eradication difficulty i can advice you to explore tetrative reconstructor and use 5-tire units. It is almost impossible to beat it with 3-tire units. If you still have questions, don't b afraid to ask me, i would be glad to answer them. Also, I am sorry if my English is bad, it is not my native language :(
I knew about the core, im researching and making my own schematics for core and resources. i just found out that you can use the storage+unloader combo instead of belt monsters! thx for replying! I don't mind about the english, i can understand it, and that's all that matters to me. my current idea is to surround the core in meltdowns in case of emergency, and then i'll go conquer overgrowth. ive been playing in sandbox recently to experiment. I'll look online, and thx again!