Hey, thanks for playing and for the great feedback. You’re absolutely right. The game, including upgrades and abilities is in need of balancing improvements.
Good feedback on the towers. I had a feeling it wasn’t super obvious what their effect was and you’re confirming that. Here’s how they work:
They create a web of connection with nearby enemies. On a timer, it sends a burst of energy out to connected enemies that buffs them (HP mainly) for a limited duration. You’ll see their color change during that time.
Open to ideas on better ways to communicate that to the player.