Well I didn't even know that we can use ZQSD.
But it's not very well made (can't jump with Z), so I'll change that in the next version.
However you can switch between ZQSD and WASD by pressing shift and alt together.
Personnaly I use the arrow keys and Space to play.
The other controls are P to pause the game and Tab to display the FPS.
Also, I just remember that you can zoom with + (yeah it's useless
)