I did not quite get how to play it, but I love the art-style and theme alot.
Good Job!
The graphic is very clean and aesthetic looking, I like minimalistic design.
Actually it is an interesting choice to not have an ideal AI, as then you could never win when the computer starts, this make it actually fun to play, as you need to think to avoid making mistakes.
A nice little and cozy game.
Well done!
I like the minimalistics art style. Seems I am way too slow for the game, since I died often without even noticing why :-)
For me it would ease it up if the zombies would approach from further afar and maybe give some indication, that you are in immediate danger when they are near or behind you. But on the other hand, I am just whining for being too slow.
Nicely done.
I had a lot of fun playing the game, made it to wave 41, then an enemy walked out of the screen :-)
A few suggestions: How can you remove placed units? And if you are a little to long on the mouse button two units are placed.
Apart from that a lovely and entertaining game, I like the art style and music, fits perfectly.