Fun but...
Is it just me, or did the firewalls love to spawn right in front of you when you respawned and over the items?
This game was pretty fun and addicting. Though the shield item seemed to have a higher rate than the other items, and it seemed to stack. I don't know if that was intentional, but I don't think it should have stacked like that. As many of them as I picked up, I was able to just run through everything for about a minute without having to worry about it wearing off.