I have to confess, the only reason why I clicked on the game was because of the title. Came for the pun stayed for the gameplay !
The concept is good, and the implementation works really well ! It's great to have so many different units with their own rules ! I think with a little work on the balancing it could become really great !
The next things I'll say are just nitpicks, and things I think you might do in the future if you want to improve your game, so I know it's things you wouldn't have the time to do during the jam timeframe.
- I'm not sure the lanes system is used to its full potential here : except for the towers that can shoot other lanes, there are no interactions between lanes. I think there are a lot of things that could be done here, to give more strategies on how to approach levels : zombies that can change lanes when they meet an obstacle, towers that shoot vertically instead of horizontally,explosions that damage multiple lanes at once... I think it's where the potential of your concept lies, so go bananas with that !
- I found the balance of some zombies a bit off sometimes : shields felt almost invincible, and bombers felt a bit useless, at least I never managed to make them reach a building before taking a hit.
- The tower that has piercing projectiles is pretty interesting, but a bit too strong currently imo. It almost one shots everything that is not a shield zombie
Wether you decide to continue working on this game or not, keep up the good work !