Hey there! Thanks for trying out my game!
I'm assuming you've got stuck on the very first red core; at the uppermost level of the map?
Well, there are 4 rooms there: One is your starting point, one houses the red core (Ahead of the start), and two side rooms; one with two yellow nodes (Power Nodes) and one with a single green node (Research node). You proceed through the game by building structures on those power and research nodes; then use the power gained to unlock new weapons & abilities.