I really like where this is going, but I don't quite get it.
Feedback: might be nice to add WASD controls, or some indication of what the controls are into the build. The instructions on the start page are not very clear to me, until a few minutes of experimentation and restarting I got what it meant.
Once the gameplay starts it feels quite fun! But after a while it feels a bit like a solved game such as tic tac toe, because it seems that I can wander in any direction without losing much mass. And when playing it I wasn't sure what the strategy was, so I felt like I was making random decisions.
Still though, great job!