The controls being ZQSD is very strange, it would be nice to have the arrow keys as well. Movement was way too fast, to the point where I was teleporting past walls. Nice music, though.
I agree with @red: The controls are totally wierd. An additional control scheme would be really helpful.
I don't know, if this is a bug, but I got stuck at the selection of the hero. No matter what I pressed or clicked, I could not select a player. After restarting the game, I couldn't even get past the first door. Really strange.
But some positive stuff: I really liked the tutorial-like start of the game. Pressing the movement keys, and highlighting the pressed ones is a neat idea.
Movement was way too fast, to the point where I was teleporting past walls.
Nice music, though.