Some units like Gunners and Blasts, are built in groups (of 2 or 3 units), but the player has individual control of them
Certain units can only be achieved through morph (eg.: Hunchback from Mortar, Hellion from C.A.N., Tyrant from Bull)
To produce units faster, try to stay positive on both metal and energy resources. Use storages to maximize your effectiveness.
Some units (Gunner, Glint, Mortar) lose accuracy when moving
Some ranged and artillery units (like Plasma bots, Samson and Morty) have a minimum attack range, ie. won’t fire at units very close to them. Holding Shift while mouse-hovering a unit will show a green circle around it, if the unit has min-range
Certain vehicles like tanks and artillery are able to retreat-move by holding Ctrl and right-clicking behind them. Useful to keep them firing while you retreat
Missiles accelerate a lot after being fired and have different turn rates, allowing fast-moving targets to dodge them
Fighter anti-air weapons, bombers and missile gunships have limited ammo, and require re-arming in a landing pad