I played the Jam version and then the updated version, the start menu is a bit wordy, there's like a whole paragraph to read to understand the basics I think it could probably be summarized or implemented more effectively, I know first hand how obtuse it can be to design a 2D game in Unity during a jam (*cough* my LD 40 entry sucked) anyways, if your looking to update the game I'd like suggest a few things:
-the town hall and the houses should probably use different sprites, it could be confusing when scaling Townsman up to find a townhall in a sea of small townhall lookalikes
-the zombies could use a visualization for ranged attacks like throwing a weapon (or spitting blood a la 28 days later)
-more ammo when purchasing from the town hall or have ammo scale up as the townhall is upgraded
though I don't want to seem like I'm commandeering your creativity, It's a good Ludum dare compo game! and it's up to you to decide whats best for Townsman! I'd love to see more updates to this!