Really like snappy controls like this. Grabbing the zombies and throwing them feels really good. Seeing them all pile up in the top looks so funny and the fact that one thrown zombie pierces through an entire heap is so satisfying.
One thing I found awkward was that the grab button is 'E' while I had to move with the 'D' button with the same finger. It would be 'handier' if I could use my other hand for the interaction (maybe via the mouse or some other keys like 'JKL').
Adding a bit of polish would make this a very enjoyable game. Well done!