Great gameplay.
Nice sprites and smooth animation, movement.
Also nice how you combined acrade gameplay with tactics, aquiring coins and buy upgrades.
How to improve?
More enemies, bosses and ofcourse, weapons!
And maybe a story line or missions.
Grapics - 7
Sprites, nice and smooth
Style - 8
Great, smooth and fun gameplay.
Nice varity of upgrades too.
Sound - 7
Nice soundtrack and special effects, the background music becomes a bit repetive though.
Violence - 8
Zombie killing fun!
Interactivity - 8
Fun game too play, won't get boring soon.
2 difficulties and a varity of rounds and upgrades.
Humor - 0
What humor?