This game has the worst AI I have ever seen in a sports game. I'm done after having a player standing facing away from the ball, it's passed to him and bounces off the back of his legs, and he continues to stand still facing away from the ball, resulting in a goal for the other team. The closest player to the ball constantly running away from it is unbelievable.
I think this game would be more fun if you removed limit on how many employees were active - make it about managing resources and stock, not employees. It would have to be tweaked to compensate (e.g. make new employees more expensive).
The towers on the right should be ordered by how often you buy them, so the ones you never use are on the second page, instead of ones you buy all the time.
Changes:
1. Counter showing how many zombies are left to spawn.
2. Ability to walk through zombies. They can still hit you, but at least you can take a hit and get away to avoid being irreparably cornered at the far edge of the map.
3. Higher weapon damage - as it is, you are forced to hide behind gates. This does not make for a good, balanced game.
4. More variety in weapon upgrades. Melee alternates between short range, higher damage swords (final one pushes) back opponents, and longer range, lower damage spears (final one with piercing damage) . Range weapons alternate between longer range, arcing slingshots (final one with splash damage), and the current shorter range, flatter arc bow & arrow (final one with piercing damage).
Blocking is horribly bugged. I just killed two of the three enemies before they did any serious damage to any of my guys. I ended up losing the fight without putting a scratch on the one enemy who did nothing but shield bash.
 "Kamicat Football"){kind=icon}
 "Swords & Potions 2"){kind=icon}
 "American Racing 2"){kind=icon}
 "Bloons TD 5"){kind=icon}
 "Wrestle Jump"){kind=icon}
 "Wild West Town"){kind=icon}
 "Zombie at the Gates"){kind=icon}
 "Psychout"){kind=icon}
 "Sands of the Coliseum"){kind=icon}