OH wow! this have lots of potential! It really brings me back to those RTS style game. The gameplay is easy to understand yet complex enough to remain fun for a long while. Though, I wish there's some way of knowing their stats, like how much dmg/attk spd/current health, etc. cause it can be hard to keep track when things get chaotic. Also would be good to have like resting time to manage the all the nodes or rebuild certain ones. The aesthetic is simple yet nice and fitting, kinda reminds me of virtual world with computer viruses attacking hahaha. Music wise, I feel could add a bit for tension to it, it's pretty chill atm to match the intensity later into the game. But, yeah overall the game seems very polish for the jam and I really enjoy playing it, could probably even make it into a mobile game!
Oh a suggestion, if you want an end goal, you a could add something like an enemy "Nexus" node (maybe a few) on the corner of the map that you need to destroy to win the game? Narrative wise, could say it's the power source of the enemy (but enemies still comes in all direction.
ps. thanks for playing my game on stream! ^_^