Interesting concept here. I am not exactly sure what the win condition is as the screen was filling up and I still won. I do think this game has the potential to be pretty difficult with some changes in that area. I will also say combining 2 expanding elements is pretty overpowered and helped clear most of the population.
Aside from those, the game is easy to understand and plays pretty well. Like I said, it has potential to be harder and can elevate the experience down the track.
Overall, great submission, good job!