A bit too slow
Interesting game, A bit to slow moving for me. I only played defence mode for awaile then I got bored.
Suggestions:
-Have some AI players. I know they are hard to program but if done right they would make the game much better. A easy thing to make would be a gunman inside the base that shots zombies that get near the base(make it an upgrade).
-Make upgrades cheaper. I got bored after a few minutes of play and the round I did complete did not give me enough experience to see the cool upgrades you seem to have.
-Have different types of zombies. You might already in later levels but I didn’t play long enough to find out. Have different coloured zombies and different types to make things interesting.
The game was to repetitive for my likening. Find zombie, empty whole clip in zombie, zombie dies, find next zombie. If you take my suggestion it could make the game more interesting. At leased for my likings.