Thanks. It didn't get a lot of love in terms of design. There were plans to focus on balancing out damage output of the plants, life of each enemy and the amount of damage each plant do to it. I wanted to make it so damage wasn't so uniform across enemies and make it so that certain plants did full damage to a specific enemy and the other enemies would receive a specific percentage of the damage from the same plant.
If I were to come back to this project, it would like make those changes, add in new enemies and plants, and try to see if i can make the levels more procedurally generated. I think I still have a lot to learn before I come back and do that.