The debris collector is a new X-Morph: Defense gameplay mechanic that we haven't talked about before. All enemies in the game explode into dozens of parts. However the debris isn't there only because it looks cool. Expert players can switch into the ghost mode and collect these parts to gain additional energy for building towers. We also keep score of how much enemy parts are collected by each player so they can compete in coop mode :) The sound and particle effects for the debris collector are still work in progress. Let us know what you think about this, or how you think we could improve this mechanic.
https://youtu.be/Hz8F0nKUGzo