I did survive! Until the wave counter went away and I figured the game was endless and exited out. I liked how there were multiple types of enemies with different characteristics. I also liked the harvesting and building mechanic.
The wave counter had some bugs, for instance it reset on the wave the small zombies appeared, and completely vanished on the wave after the tank zombies.
The hitboxes were also much larger than the sprites, which also felt janky. In my opinion it's always better to undersize hitboxes than over size them.
Running around and killing zombies as they are chasing you seemed to be the optimal strategy because you could easily outrun them. Which is a shame because I liked the building mechanic and was looking forward to using it more. Unfortunately, the bullets would hit the walls if they were even in the same zipcode as the wall, and the player couldn't fit through spaces that visually they should be able to fit into.
Even though my review has a lot of criticism, it is because I believe this game is close to being a really enjoyable game but has a few simple flaws that hold it back. Keep working on it and you have a fun flash game on your hands!