Finally managed to get electricity with this set, thanks. I actually thought that the stone furnace used electricity since it says "90kW" but coal works... Discovered how to research then, but quickly meet first enemy, next barely got time to build two walls that seven came in a row. I discovered that gun uses energy that refill slowly and lost everything... I will gather courage to try again later with focusing on laser turret
I think you should introduce enemy more steadily. Also, it's very annoying to look all the time for the recipe for something. Why not put a pop-up at what is needed when you hover over the button?