Fun idea and unique interpretation of the theme. WASD worked in my browser (Chrome), so I would be curious why it wasn't working for some of the other commenters. I found myself wishing that items would respawn or that I could quickly restart a level, because there were a couple times where I used up all the items (I think) and hadn't managed to kill all the enemies, so I just had to sit and wait for the timer. Great job
If you get a chance, I'd appreciate any feedback on my game as well. Thanks!