Firewall

Malware packets crawl the glowing trace toward your network — stop them before they leak through. Tap an empty socket to build: firewalls burn single targets, scanners slow everything nearby, honeypots splash whole clumps. Upgrade or sell any tower. Trojans are fast, and every fifth wave a worm crashes the party. Survive all twenty waves to secure the network.

Keyboard: N/Space start the next wave · P pause — building is tap/click