Right, neutrals have the biggest potential for multiplayer. It's often too risky and unworkable to steal honeypots (bunches of other players' lix), but honeypots are lovely.
Forestidia is right that neutrals have been on the waiting list for long and haven't gotten implemented yet, even though it's a great idea. The rabbit hole here is: Adding neutrals is a physics change and a level format change. The networking server allows all connected people to play with each other, and excludes from connecting if somebody has outdated physics. Thus, whenever I update physics or the level format, players should update to the newest version.
But we have a Debian package of Lix that updates every 2 years at best. If I update physics freely, I decline Debian users my central server. If I update physics too slowly, as I do now, we don't get enough testing of new physics and I still have unmerged physics changes from 2017 in a side branch.
To resolve this, my plan for 2021 is to rework the end-of-level screen, and then to work on the server, allowing people with different client versions to play in separate rooms. Networking protocol incompatibilites can, if necessary, be hidden in the server, who then has to support several versions for a few years.
This opens the door to neutral lixes and to
player handicapping.
Ginger Lixes, a 2014 topic on potential neutral color.
-- Simon