Pretty neat and inventive! I like the movement animations for the player character, it's simple but full of character.
I had no idea my own traps were going to hit me as well, I was the first victim to them!
It's pretty tough (for me, at least) to kite the zombies over the traps, and grab the coins from them with the right timing. And, also, getting down more traps when they have to be built by hand. At my best I only managed to put three down before I got overwhelmed, but I might have been playing too impatiently.