Making a PvZ style game where you can *expand the field yourself* is so interesting! If you expanded on this further, I wonder if there's a way to incentivize expanding to additional lanes - special rewards or progression like unlocking cooler towers and/or tougher challenges, maybe. I also couldn't tell if this was already happening, but I was hoping that by my backmost fire shooters' bolts would get bigger by passing through the head of the fires in front - scaling their bullets that way. Very fun!